am 6a3075c7: adb: Add adbd to the AID_SDCARD_RW group to allow writing to the SD card.

Merge commit '6a3075c78287ea5a7ee7a3c85cde58e894350822'

* commit '6a3075c78287ea5a7ee7a3c85cde58e894350822':
  adb: Add adbd to the AID_SDCARD_RW group to allow writing to the SD card.