Add API to support ASL-in-APK

Add API to allow ap to get the source that provides app metadata.

Bug: 323131020
Test: build pass and boot success.
Test: atest InstallAppMetadataTest
Test: atest PackageManagerSettingsTests

Change-Id: I07b6162591d1b848fcd1c17fe28786d47dbe7023
10 files changed