aapt: silence these warnings

to show them, set SHOW_MANIFEST_WARNING

Change-Id: I8fd3617e03ca535df1ae0ebdb3dde3a67eb2737b
AndroidRuntime: reduce logcat debug spam

this ought to prevent log messages similar to:
D/AndroidRuntime(12391):
D/AndroidRuntime(12391): >>>>>> AndroidRuntime START com.android.internal.os.RuntimeInit <<<<<<
D/AndroidRuntime(12391): CheckJNI is OFF

Change-Id: Ie6948daf552d138c97ade941bedb8714f03145a3