Allow aconfig proto parsing from CrashRecovery

We would be parsing aconfig_flags.pb to get the set of namespaces used
in all the apexes.
Make libaconfig_java_proto_lite available to CrashRecovery apex.

Bug: 397776123
Test: atest CrashRecoveryUtilsTest
Flag: EXEMPT adding helper method
Change-Id: Ibc0a74892c465adc9bfea88520eafbdf889c41e5