Enable Ambient display

Change-Id: I55af2f87b1fc06a9870c96bad86c7bab19d85999
d2: fix a2dp: set sample rate to 48K

Change-Id: I1ab2d364b70d8743a0bd5a4a33ae82de92c313a6
Add d2bst to barrier and if else its modem files

Change-Id: Ie64b94b71e8af6b17244e9aa15f9d6db384a7bf1
Merge "Add d2bst to barrier and if else its modem files" into lollipop
Use normal case for Carrier Text in LockScreen.

For example: Nexus 6 on Verizon shows "Verizon Wireless" not
"VERIZON WIRELESS" on the lockscreen.

Change-Id: I89b7fa81f140bbda8a88932e8850525b30f9e921
audio: don't separate a2dp output and re-enable lpa

Change-Id: I951c86f43d34dc9bafaa846763349f42b9c2c8b4
d2: update hardware key overlays

Change-Id: I0bdf8b8d14796f54db7775e2bd89808e52253dd2