Repository: flutter
Issue: [google_maps_flutter] White screen sometimes appears when resuming the map app.
Labels: e: device-specific,platform-android,p: maps,package,has reproducible steps,P2,team-android,triaged-android,found in release: 3.24

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I build the app which is the same as the sample of google_maps_flutter package.
I found the app sometimes displays white screen with google logo. It seems to happen when resuming an activity.

I use the latest google_maps_flutter package, ver 2.0.6. and It reproduces on Pixel 4a 5G with Android 11, rate is 1/10 times or fewer.

## Steps to Reproduce

<!-- You must include full steps to reproduce so that we can reproduce the problem. -->

1. Start the map app.
2. Stop the map app. The app goes into background
3. Play the other apps
4. Restart the map app.

**Actual results:** <!-- what did you see? -->
A white screen appears after the map is displayed for a moment
<img src="https://user-images.githubusercontent.com/70552230/120266818-a95df480-c2dd-11eb-872b-bcd5eb1dff13.gif" height="450" />	

<details> 
<summary>flutter doctor -v</summary> 
	
```console
[√] Flutter (Channel stable, 2.2.0, on Microsoft Windows [Version 10.0.19041.985], locale ja-JP)
    • Flutter version 2.2.0 at F:\AndroidStudio\flutter
    • Framework revision b22742018b (2 weeks ago), 2021-05-14 19:12:57 -0700
    • Engine revision a9d88a4d18
    • Dart version 2.13.0

[√] Android toolchain - develop for Android devices (Android SDK version 30.0.3)
    • Android SDK at C:\Users\yyosh\AppData\Local\Android\sdk
    • Platform android-30, build-tools 30.0.3
    • Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)
    • All Android licenses accepted.

[√] Chrome - develop for the web
    • Chrome at C:\Program Files (x86)\Google\Chrome\Application\chrome.exe

[√] Android Studio (version 4.1.0)
    • Android Studio at C:\Program Files\Android\Android Studio
    • Flutter plugin can be installed from:
       https://plugins.jetbrains.com/plugin/9212-flutter
    • Dart plugin can be installed from:
       https://plugins.jetbrains.com/plugin/6351-dart
    • Java version OpenJDK Runtime Environment (build 1.8.0_242-release-1644-b01)

[√] Connected device (3 available)
    • Pixel 4a 5G (mobile) • 13111JECB06465 • android-arm64  • Android 11 (API 30)
    • Chrome (web)         • chrome         • web-javascript • Google Chrome 90.0.4430.212
    • Edge (web)           • edge           • web-javascript • Microsoft Edge 91.0.864.37

• No issues found!
```

</details>