Use prefixes for binder cache SELinux properties.

Adds a context for telephony related cache properties and changes
the bluetooth and system_server properties to match off of prefix
instead of exact string matches.

Test: Flashed phone with PowerManager caches enabled and verified
that the phone boots.

Change-Id: I9110192a12bb6222e49a8fb6b266d6067ef2ea92
5 files changed