Docs: Changed GitHub samples link to point to "Google Samples" page on GitHub.
Docs: Changed GitHub samples link to point to "Google Samples" page on
GitHub.

Bug: 28223672
Change-Id: Ie168740a3f9c8393379d09bb97c7f6422d8fb9dd

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