Possible fix for the restart problem.

Using background executor instead of FgThread.

Bug: 177371679
Test: atest PackageManagerShellCommandTest PackageManagerShellCommandIncrementalTest IncrementalServiceTest PackageManagerServiceTest ChecksumsTest
Change-Id: I84be7be5d0ec32c54ebb5c4a8c2a87713c476ac8
1 file changed