Changes Activity to use Dumpable for "legacy" cases.

Test: adb shell am start com.android.settings && adb shell dumpsys activity com.android.settings --autofill
Test: atest CtsAppTestCases:android.app.cts.ActivityDumpTest

Bug: 149254050

Change-Id: I658b18a965f3d35c3ecbb2aae58c7c7d7527c6e4
6 files changed