Extract ASL from APK

ASLs in APKs will only extracted if no app metadata is provided by the
installer. The ASL file must be placed in the assets folder of the APK
as "app.metadata".

Bug: 323510649
Test: atest InstallAppMetadataTest
Change-Id: Iff6a1c00069b22153d864eb6bc77662a37e5dfc0