Dismiss Play Protect dialog faster for PackageManagerServiceTests

Play Protect dialog is displayed to either prompt for confirmation of
the install or to report that the install was denied, causing the test
to timeout. Dismiss it faster so that the tests can continue.

Bug: 283797480
Test: atest PackageManagerServiceServerTests:PackageManagerTests
Change-Id: Ia54d509dd916aa245d7cfbc4576a68d042b05c65