docs: Update getting started creating Wearable apps with proper prereqs and instructions.
docs: Update getting started creating Wearable apps with proper prereqs and instructions.

Bug:17392020
Change-Id: I668cd0766a216786b019425474b0bb36c6e12443

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