Fix cast to String[] in FullBackupAgent
Fix cast to String[] in FullBackupAgent

obj.toArray() can't return anything more specific than Object[], so use
obj.toArray(new String[obj.size()]) to do this instead.

Change-Id: I87a0a2bb10206a37b28a535652a8f81f94c1f06f

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