Launcher3: Add toggle to enable scroll vibration

* It may leads to poor UX on devices don't have a good
  vibration motor

Change-Id: Ie1b3532f2aae00b90fd39ac8f6294c79b8bc67a5

Author: D3nesyan

quickstep/src/com/android/quickstep/views/RecentsView.java

@@ -80,6 +80,7 @@
 import android.content.Context;
 import android.content.Intent;
 import android.content.LocusId;
+import android.content.SharedPreferences;
 import android.content.res.Configuration;
 import android.graphics.Bitmap;
 import android.graphics.BlendMode;
@@ -132,6 +133,7 @@
 import com.android.launcher3.DeviceProfile;
 import com.android.launcher3.Insettable;
 import com.android.launcher3.InvariantDeviceProfile;
+import com.android.launcher3.LauncherPrefs;
 import com.android.launcher3.PagedView;
 import com.android.launcher3.R;
 import com.android.launcher3.Utilities;
@@ -449,6 +451,8 @@ public Float get(RecentsView view) {
     // mTaskGridVerticalDiff and mTopBottomRowHeightDiff summed together provides the top
     // position for bottom row of grid tasks.
 
+    private static final String KEY_SCROLL_VIBRATION = "pref_scroll_vibration";
+
     @Nullable
     protected RemoteTargetHandle[] mRemoteTargetHandles;
     protected final Rect mLastComputedTaskSize = new Rect();
@@ -1473,6 +1477,9 @@ protected void onScrollOverPageChanged() {
     }
 
     private void vibrateForScroll() {
+        if (!LauncherPrefs.getPrefs(mContext).getBoolean(KEY_SCROLL_VIBRATION, true)) {
+            return;
+        }
         long now = SystemClock.uptimeMillis();
         if (now - mScrollLastHapticTimestamp > mScrollHapticMinGapMillis) {
             mScrollLastHapticTimestamp = now;

res/values/bianca_strings.xml

@@ -71,4 +71,7 @@
     <string name="icon_pack_add">Install more</string>
     <string name="icon_pack_no_market">There\'s no available app store</string>
 
+    <!-- Scroll Vibration -->
+    <string name="pref_scroll_vibration_title">Scroll Vibration</string>
+    <string name="pref_scroll_vibration_summary">Haptic feedback while scrolling through recent apps, if supported</string>
 </resources>

res/xml/launcher_preferences.xml

@@ -81,6 +81,13 @@
             android:defaultValue="false"
             android:persistent="true" />
 
+        <SwitchPreference
+            android:key="pref_scroll_vibration"
+            android:title="@string/pref_scroll_vibration_title"
+            android:summary="@string/pref_scroll_vibration_summary"
+            android:defaultValue="false"
+            android:persistent="true" />
+
     </androidx.preference.PreferenceCategory>
 
     <androidx.preference.PreferenceCategory