Restore mounting of sdcard in mass_storage mode

Fixes Mount SD card option in USB computer connection.
Reported by ghsr.

This partially reverts commit 5131ba3.
common.mk: Remove "brcm.graphics.async_errors" property

It's already defined in initialization scripts
Remove libskia_legacy package
audio_policy: Use 48KHz sampling rate for A2DP
audio_policy: little clean up
Add common bdroid_buildcfg.h
Remove F2FS package
ramdisk: Update layout of init.log.rc
common: Update
SELinux: adress /dev/flightmode-opt denial
BoardConfigCommon: Remove BOARD_CUSTOM_RECOVERY_KEYMAPPING