In settings, reduce calls to getInstance(), and pass it to preferences and their controllers instead.
Bug: 360399800
Test: atest ZenModesListItemPreferenceTest ZenModesListPreferenceControllerTest
Flag: android.app.modes_ui
Change-Id: I318320575e3bd32b5d13a385fa644f8032484e1c
* Sometimes would cause an unending stream of accessibility events (particularly if starting off-screen). This would break TalkBack and anything that depends on UiAutomator (although the system itself took it like a champ).
* Sometimes would not load images (because the ViewTreeObserver would never fire onGlobalLayout after being added because measured width was 0, even though a new width was calculated later).
* Would not recalculate the number of icons that fit if the width changes after the first layout.
Combining ViewHolders with waiting for measuring and/or ViewTreeObservers was always a wonky approach, even though it should've worked in theory. This should be more robust.
Also fixes the unwanted animation on mode screen load related to the absence of the header name being applied a tad too late.
Fixes: 359948417
Fixes: 360072876
Fixes: 360328804
Test: atest SettingsRoboTests + manual + adb shell uiautomator events
Flag: android.app.modes_ui
Change-Id: I7e5dfbdab220d1ebc1c68e5e87ce544ee86b6a65
Also, don't apply the layout params, etc on each call to updateState - once per displayPreference is enough.
Fixes: 356399449
Bug: 357861830
Test: manual
Flag: android.app.modes_ui
Change-Id: I6967ea1745377d0f514ca0f68101043f017a8fd7
* Show blurb based on mode type.
* Make the icon bigger and highlight it when mode is active.
* Increase spacing between elements.
Also eliminate some code duplication between header of mode page and header of icon picker.
Fixes: 355415875
Test: manual
Flag: android.app.modes_ui
Change-Id: I7e788b9b5920cedb791d1571b19b37e65ece6d0b
