SystemUI: Needed in L

Change-Id: I3c15d0c7cbce39c09d9290932d2e633087c78b9a
Camera: override camera2.portability.force_api property
Default API version in L AOSP is 2 and that is causing problem for
targets which don't support API2. Added this property for targets
which doesn't support as of now API2.
audio: fix audio recording failure

- AudioPolicyManager picks up 5.1 channel mask which
  is the last entry of input profile channel masks.
  However, 5.1 surround sound recording is supported
  only when corresponding system property is set.
- Fix this issue by setting AUDIO_CHANNEL_IN_FRONT_BACK
  as the last entry of the input profile which is supported
  by default.

Change-Id: I5212a2dcf168b135870bac3e1163feecc0f6849d
Use dlmalloc and more fonts

Change-Id: I6e088d805c402da3355a3967411ee3d8d0382fc0

Conflicts:
	BoardConfigCommon.mk
Audio fix
BT fix