bluetooth: switch to Bluedroid stack

Conflicts:
	patches/install.sh
	rootdir/init.qcom.rc
bluetooth: use bt-pan instead of bnep
camera: don't force preview size
common: fix some identitation

Conflicts:
	overlay/frameworks/base/core/res/res/values-mdpi/dimens.xml
	overlay/frameworks/base/core/res/res/values/arrays.xml
wifi: fix tethering

Conflicts:
	patches/install.sh
common: some changes in config, overlay

Conflicts:
	overlay/frameworks/base/core/res/res/values/arrays.xml