- Print compatibility mode info and activity token on AutofillManager.dump().
- Add --autofill option on Activity so it just dump autofill state.
Also fixed checkstyle import warnings on ActivityManagerShellCommand.
Bug: 112417431
Bug: 112584717
Test: adb shell dumpsys activity top --autofill
Change-Id: Id56b56a5d7e591d5204663a1da1322a15f8ef3aa
(cherry picked from commit b546ca7916)