Merge changes I31c4f4d2,I35530e7e,Ib541e676,I2b8de9c8,I759f7022, ... into udc-dev-plus-aosp

* changes:
  Fix kotlin nullable errors in TrustTests
  Fix kotlin nullable errors in Input tests
  Fix kotlin nullable errors in services tests
  Fix kotlin nullable errors in StatementService
  Fix kotlin nullable errors in SettingsLib
  Fix kotlin nullable errors in EasterEgg
  Fix kotlin nullable errors in PackageInstallerSessions
  Fix kotlin nullable errors in perftests