Enable subclass of SeekBarVolumizer to provide a custom file for sample playback.
Enable subclass of SeekBarVolumizer to provide a custom file for sample playback.

Bug: 3409194
Change-Id: I8a408a69fd14cf9058afe01ac5c46d0f5afc1503

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