Parse apk container of apex files using lite parser during boot

In order to enable rollback for apks inside apex, we need to figure out
the apexModuleName of an apex session using apexPackageName. For that we
need a mapping. Currently, we use populateAllPackagesCacheIfNeeded to
create the mapping, but the above method fully parses the apex file
which takes long time.

In this CL, we optimize the parsing by using a lite parser to create the
mapping.

Bug: 142712057
Test: atest StagedRollbackTest#testRollbackApexWithApk
Change-Id: Ia0e3c473268dc90ae20e934d910ecd67cfd8cb19