Add constant for Daydream settings.
Add constant for Daydream settings.

Bug: 7480927
Change-Id: I383170c6c543b5ffe81568d273389585498d369b

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