Docs: Update "What's New" for L Final Preview samples
Docs: Update "What's New" for L Final Preview samples

Change-Id: Idc414ffa3b391212136601bd0f65dbcab07efe1e

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