Invoke-customs are only supported starting with Android O (--min-api 26)

```
Invoke-customs are only supported starting with Android O (--min-api 26)
Stack trace:
com.android.tools.r8.a: Invoke-customs are only supported starting with Android O (--min-api 26)
	at com.android.tools.r8.dex.r.a(:291)
	at com.android.tools.r8.dex.r.a(:98)
	at com.android.tools.r8.dex.r.b(:188)
	at com.android.tools.r8.dex.b.a(:63)
	at com.google.common.util.concurrent.TrustedListenableFutureTask$TrustedFutureInterruptibleTask.runInterruptibly(TrustedListenableFutureTask.java:125)
	at com.google.common.util.concurrent.InterruptibleTask.run(InterruptibleTask.java:69)
	at com.google.common.util.concurrent.TrustedListenableFutureTask.run(TrustedListenableFutureTask.java:78)
	at com.google.common.util.concurrent.MoreExecutors$DirectExecutorService.execute(MoreExecutors.java:322)
	at java.util.concurrent.AbstractExecutorService.submit(AbstractExecutorService.java:134)
	at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:66)
	at com.google.common.util.concurrent.AbstractListeningExecutorService.submit(AbstractListeningExecutorService.java:36)
	at com.android.tools.r8.dex.b.b(:46)
	at com.android.tools.r8.D8.d(:92)
	at com.android.tools.r8.D8.b(:1)
	at com.android.tools.r8.utils.W.a(:30)
	at com.android.tools.r8.D8.run(:11)
	at com.android.builder.dexing.D8DexArchiveBuilder.convert(D8DexArchiveBuilder.java:116)
	at com.android.build.gradle.internal.dexing.DexWorkActionKt.process(DexWorkAction.kt:194)
	at com.android.build.gradle.internal.dexing.DexWorkActionKt.processNonIncrementally(DexWorkAction.kt:164)
	at com.android.build.gradle.internal.dexing.DexWorkActionKt.launchProcessing(DexWorkAction.kt:91)
	at com.android.build.gradle.internal.dexing.DexWorkAction.run(DexWorkAction.kt:49)
	at org.gradle.workers.internal.AdapterWorkAction.execute(AdapterWorkAction.java:50)
	at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:50)
	at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:63)
	at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:59)
	at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:98)
	at org.gradle.workers.internal.NoIsolationWorkerFactory$1.lambda$execute$0(NoIsolationWorkerFactory.java:59)
	at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
	at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:416)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:406)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor$1.execute(DefaultBuildOperationExecutor.java:165)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:250)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:158)
	at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:102)
	at org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
	at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
	at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:53)
	at org.gradle.workers.internal.DefaultWorkerExecutor.lambda$submitWork$2(DefaultWorkerExecutor.java:200)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:215)
	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
	at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
	at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
	at java.lang.Thread.run(Thread.java:748)
	Suppressed: java.util.concurrent.ExecutionException: com.android.tools.r8.a: Invoke-customs are only supported starting with Android O (--min-api 26)
		at com.google.common.util.concurrent.AbstractFuture.getDoneValue(AbstractFuture.java:552)
		at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:513)
		at com.google.common.util.concurrent.FluentFuture$TrustedFuture.get(FluentFuture.java:86)
		at com.android.tools.r8.utils.U0.a(:14)
		at com.android.tools.r8.dex.b.b(:101)
		... 39 more
	[CIRCULAR REFERENCE:com.android.tools.r8.a: Invoke-customs are only supported starting with Android O (--min-api 26)]
```

# 解決策
Javaのバージョンを上げる

[AndroidXのmaterial:1.1.0-alpha08にアップデートしたらビルドエラー](https://qiita.com/pongi/items/02596f6990f63a7fb4db)

``` app/build.gradle
android {

    ・・・

    compileOptions {
        sourceCompatibility JavaVersion.VERSION_1_8
        targetCompatibility JavaVersion.VERSION_1_8
    }
}
```