Move 'dismiss prediction' to droptarget

This is done to avoid shortcuts being crowded when a predicted app is
long pressed.

Bug: 148707493
Test: Manual
Change-Id: I356a2cebfcc329478d96ee815fd641179359a572
diff --git a/src/com/android/launcher3/Launcher.java b/src/com/android/launcher3/Launcher.java
index 445ebc0..cfbe2f1 100644
--- a/src/com/android/launcher3/Launcher.java
+++ b/src/com/android/launcher3/Launcher.java
@@ -32,7 +32,6 @@
 import static com.android.launcher3.logging.LoggerUtils.newContainerTarget;
 import static com.android.launcher3.logging.LoggerUtils.newTarget;
 import static com.android.launcher3.popup.SystemShortcut.APP_INFO;
-import static com.android.launcher3.popup.SystemShortcut.DISMISS_PREDICTION;
 import static com.android.launcher3.popup.SystemShortcut.INSTALL;
 import static com.android.launcher3.popup.SystemShortcut.WIDGETS;
 import static com.android.launcher3.states.RotationHelper.REQUEST_NONE;
@@ -2691,7 +2690,7 @@
     }
 
     public Stream<SystemShortcut.Factory> getSupportedShortcuts() {
-        return Stream.of(APP_INFO, WIDGETS, INSTALL, DISMISS_PREDICTION);
+        return Stream.of(APP_INFO, WIDGETS, INSTALL);
     }
 
     public static Launcher getLauncher(Context context) {