docs:change required ADT version to 23.0.2
docs:change required ADT version to 23.0.2

Change-Id: I6312cd45df94a89f2812aa3c53e2974f6cfbb0ed

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