Allow staging multiple session with non-overlapping packages (apk-only)

Bug: 141843321
Test: atest StagedInstallTest#testAllowNonOverlappingMultipleStagedInstall_BothSinglePackage_Apk
Test: atest StagedInstallTest#testFailOverlappingMultipleStagedInstall_BothSinglePackage_Apk
Test: atest StagedInstallTest#testFailOverlappingMultipleStagedInstall_BothSinglePackage_Apex
Test: atest StagedInstallTest#testAllowNonOverlappingMultipleStagedInstall_MultiPackageSinglePackage
Test: atest StagedInstallTest#testFailOverlappingMultipleStagedInstall_BothMultiPackage
Test: atest StagedInstallTest#testMultipleStagedInstall_ApkOnly
Test: atest RollbackManagerHostTest#testApkOnlyMultipleStagedRollback
Test: atest RollbackManagerHostTest#testApkOnlyMultipleStagedPartialRollback
Test: atest StagedInstallTest
Change-Id: Iad2e35b50fd22e207e3ad91b48a767827d8e8926
Merged-In: Iad2e35b50fd22e207e3ad91b48a767827d8e8926