msm7x30-common: Remove redundant CFLAGS

* These are set in qcom_target.mk
msm7x30-common: Include Google's common media codecs
msm7x30-common: Don't build legacy audio policy

* QCOM A family uses the frameworks/av audio policy now

Change-Id: I5d4a7f80396ce3e3c2f864413f215f5f54424eb8
msm7x30-common: Use cortex-a8 cpu variant

Change-Id: I7f8484e152db006306d293b6b4d0ce8cabc19e9b
libcamera: Use project pathmap for headers
libcamera: Add necessary header directory for compilation
msm7x30-common: Disable unsupported overlays
libcamera: Fix compile problem