Reserve some AIDs for OEMs

OEMs frequently add some AIDs on their own. Reserve some range
for them to use.

Change-Id: I3c729c889c9bd3e105ae4f6fb0c04a42a10eb25c
Remove long-dead readtty.

Change-Id: I15ae14542214a3802d43892da0d03cfb33e63c96
Update permissions to the superuser binary

Change-Id: Ia382c74854cfbe625653b8b6b016b37f93132658
core: Fix compile error with QCOM_LEGACY_UIDS

Change-Id: I01c7f73ba0e87533ae06b8af183b4c88dbbf944e

Conflicts:

	private/android_filesystem_config.h