Merging ub-launcher3-qt-qpr1-dev, build 5872416

Test: Manual

Bug:121280703 P2 Finish implementation of PortraitLandscape annotation for tests
Bug:135633159 P3 [QPR] Promise icons on home screen
Bug:135638690 P1 [QPR] On-device app search
Bug:137106918 P2 UX: Accidental NGA triggering when hitting Undo actions in apps
Bug:137200188 P3 Home screen app title disappears during animation
Bug:138195597 P2 Wrong icon animated on return to home screen
Bug:138396187 P1 Swipe and hold from an app no longer uses spring to animate adjacent task
Bug:138729157 P1 [Flaky test] java.lang.AssertionError: http://go/tapl : want to fling backwards in widgets, flung back, but the current state is not WIDGETS; Unexpected launcher object visible: workspace
Bug:138729456 P1 [Flaky test] java.lang.AssertionError: http://go/tapl : Can't find an object with selector: BySelector [CLASS='\Qandroid.widget.TextView\E', PKG='\Qcom.google.android.apps.nexuslauncher\E', TEXT='\QShortcut 3\E'] (visible state: Workspace)
Bug:138964490 P1 Support DeviceConfig to drive ToggleableFlags
Bug:139021165 P2 [TEST TRACKER] [QPR] Promise icons on home screen
Bug:139137636 P2 Create memory tests for Launcher
Bug:139551306 P4 [Polish] Reduce shelf paddings in Overview
Bug:139885365 P3 App open animation different between launcher suggested apps and launcher home screen/drawer
Bug:139918680 P2 [a11y] Talkback shouldn't keep focusing on the background item and speak the description of the background item again after entering Widget list.
Bug:140076379 P1 Launcher ub-launcher3-qt-qpr1-dev Branch Build Keeps Crashing due to Exception
Bug:140252951 P2 Add widget launch test.
Bug:140308849 P2 Jank during swipe up to home, especially noticeable after pausing first
Bug:140311911 P2 Flake in Launcher tests: java.lang.AssertionError: Stable state != state: OverviewState, LauncherState
Bug:140405990 P2 [a11y] Unable to add shortcut to Home screen by Voice access or Switch access.
Bug:140819614 P1 If an install session is abandoned for an already installed app, the corresponding icon is removed
Bug:140823188 P1 AppPredictionsUITests failing
Bug:140837771 P1 Failing test: AddConfigWidgetTests and AddWidgetTests are failing
Change-Id: I1efae6216c53b1fee3e105c9356ed43c4bf46c6e