redirect adt guide to release notes to consolidate the deprecation message. related deletion of file: https://critique.corp.google.com/#review/123463890
redirect adt guide to release notes to consolidate the deprecation message.
related deletion of file: https://critique.corp.google.com/#review/123463890

Change-Id: Ia9b533ec52a0fd05fcfeede04dda64ae6041c6a2

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