Add permission annotations on the AccountManager
Add permission annotations on the AccountManager

Also add some @NonNull and @Nullable annotations.

Change-Id: Ia42b1af21ed14691b2268ea8b0f55d1b8b5ea2a3

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