Rename "private api" to "system api", as the annotation indicates.
Rename "private api" to "system api", as the annotation indicates.

Change-Id: I84161682406c28658a101ecb66a5bf9b2d6f38b3

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