Reduce package parsing times

After committing the install session, a single APK would be parsed
several times even if this APK doesn't change. We should store the
parsed result, and then reuse it to save unnecessary parsing calls
during the installation.

Bug: 138292426
Test: atest PackageManagerTest
Test: atest PackageManagerTests
Test: atest PackageManagerServiceTest
Test: atest PackageManagerShellCommandTest
Test: atest PackageParserTest
Test: manually both staged and non-staged install APK from adb
Test: manually install APK from Play Store and Android Studio
Change-Id: Ie786d964ac96536015e83e36865505a1f34e3cbf