Adds all_apps_sheet_for_handheld flag.

This flag causes All Apps to render on a background panel in
handheld mode similarly to how it does on tablets.

Demo: https://drive.google.com/file/d/11K8yueTb9Xr8oRJCM3TxcFH8V3rRFJrJ/view?usp=sharing&resourcekey=0-hMNEGzMQ5KC9D7may2Gb-g

Bug: 374186088
Bug: 372618421
Test: Manual
Flag: com.android.launcher3.all_apps_sheet_for_handheld
Change-Id: Ie0b1e784d4330fd71f7f36f39e5dd85e8ee14933

src/com/android/launcher3/touch/AllAppsSwipeController.java

@@ -198,7 +198,7 @@ public class AllAppsSwipeController extends AbstractStateChangeTouchController {
      * Applies Animation config values for transition from all apps to home.
      */
     public static void applyAllAppsToNormalConfig(Launcher launcher, StateAnimationConfig config) {
-        if (launcher.getDeviceProfile().isTablet) {
+        if (launcher.getDeviceProfile().shouldShowAllAppsOnSheet()) {
             config.setInterpolator(ANIM_SCRIM_FADE,
                     Interpolators.reverse(ALL_APPS_SCRIM_RESPONDER));
             config.setInterpolator(ANIM_ALL_APPS_FADE, FINAL_FRAME);
@@ -240,7 +240,7 @@ public class AllAppsSwipeController extends AbstractStateChangeTouchController {
      */
     public static void applyNormalToAllAppsAnimConfig(
             Launcher launcher, StateAnimationConfig config) {
-        if (launcher.getDeviceProfile().isTablet) {
+        if (launcher.getDeviceProfile().shouldShowAllAppsOnSheet()) {
             config.setInterpolator(ANIM_ALL_APPS_FADE, INSTANT);
             config.setInterpolator(ANIM_SCRIM_FADE, ALL_APPS_SCRIM_RESPONDER);
             if (!config.isUserControlled()) {