This CL moves the code building index of IMEs from
InputMethodAndLanguageSettings to VirtualKeyboardFragment and
AvailableVirtualKeyboardFragment, so that a search landing page of IME
becomes one of the fragment correctly depending on the IME state.
Bug: 32643633
Test: Manually installing/uninstalling AOSP LatinIME.apk while
Settings app is/isn't running, then search AOSP and verify the
landing page is correctly determined by the IME's enable state.
Test: Update robolectric DynamicIndexableContentMonitorTest
Change-Id: Ie44f358c2d3919fc864f4f88e6229293113823dd
Bug: 30681771
Test: SettingsUnitTests
Refactor visibility logging from InstrumentedFragment into a mixin. And
apply mixin in remaining fragments.
Change-Id: Ibbb59904336254a3e4bb9e8c7d0b36e5a6bc2622
1. Introduces new UI components as per the new flow
2. Temporarily disables components in the old flow that are to be
replaced by the new flow. This is done so we can neatly revert
to the old flow if there are issues with the new flow
3. AvailableVirtualKeyboardActivity now responds to
android.settings.INPUT_METHOD_SETTINGS intents instead of
InputMethodAndLanguageSettingsActivity
Bug: 25752812
Change-Id: I728d7ee185827ed328c16cb7abce244557a26518
