Make AudioGroup.add locale safe
Make AudioGroup.add locale safe

Explicitly use Locale.US in AudioGroup.add to avoid
unexpected results in some locales.

Change-Id: Ifb477ca590f630747e09e38ac2246d284b5c5bfc

xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base,xorware/android_frameworks_base