Update hardware keys overlay
ramsidk: Clean up USB configuration

Don't force mount sdcard in mass_storage mode
ramdisk: Fix USB configuration

- Remove unused ACM on MTP and PTP
- Fix RNDIS configuration
Update BoardConfigCommon.mk
Update common.mk
media_codecs: Advertise that our encoders only support VBR
Enable Miracast
SELinux: Update policies
audio_policy: Fix remote submix configuration

Thanks to pawitp
SELinux: Remove unneeded sepolicy