d850: update bt config

Change-Id: If449acee9d6cd15249df6f413b4d2cd80b8910f6
system.prop: update for d855

Change-Id: Ifb10a64541b530f5940681e71a6f6cc4067d40a9
d855: set correct system partition size

Change-Id: I8fad9a140dac8e81de248bb7302a884c24c6f468