remove device list for nexus devices, clarify its needed for adb
remove device list for nexus devices, clarify its needed for adb

Change-Id: Ia4ec153e09a0644eeaeb1f78150b795b74afdf80

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