Cherish: Incall vibration option [3/3]

* this works with google and aosp dialer :)

Adapted to PE

Change-Id: Ia3a239ef4c3c5e9ad6e1efae5def7e06f333cbfe

src/com/cherish/settings/fragments/IncallFeedbackPreferenceController.java

@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2019 The PixelExperience Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.cherish.settings.fragments;
+
+import android.content.Context;
+import android.telephony.TelephonyManager;
+
+import com.android.settings.core.BasePreferenceController;
+
+public class IncallFeedbackPreferenceController extends BasePreferenceController {
+
+    public IncallFeedbackPreferenceController(Context context, String key) {
+        super(context, key);
+    }
+
+    @Override
+    public int getAvailabilityStatus() {
+        return isVoiceCapable() ? AVAILABLE : UNSUPPORTED_ON_DEVICE;
+    }
+
+    private boolean isVoiceCapable() {
+        TelephonyManager telephony =
+                (TelephonyManager) mContext.getSystemService(Context.TELEPHONY_SERVICE);
+        return telephony != null && telephony.isVoiceCapable();
+    }
+
+}