m7-common: change usbdisk write permission

Users are not able to write to /storage/usbdisk because they are not
part of the media_rw (1023) group. Remove the write restriction.

Change-Id: I2ec50f3cc49154d2bfa60d8b5f1cfd54222e8a6e
m7-common: add libCB

Change-Id: I7556d536c92fc9741ffc839930db116581a6769c
m7-common: Don't allow insecure allocations from MM heap

* Userspace is OK with this and will redirect to the IOMMU.
  This will allow us to switch the MM heap to CMA and reclaim
  the space when not being used.

Change-Id: I25abcd0e22cc63e5751c85f4b1c4d2c389fb2783
m7-common: add I420colorconvert and mm-color-convertor

Change-Id: I666ba8c350616b9c82df2477f4cb6f9492fa3576
m7-common: Add extended extractor to proprietary file list

Change-Id: I5db34a83ed39f29b19a1be1ab2e5c48ce64db3ad