Add appOps settings for accessibility volume control

Test: make
Bug 30448020

Change-Id: I88b6fa1da646f4067115d4ef77051f1fed5fa46c

res/values/arrays.xml

@@ -617,6 +617,7 @@
         <item>turn on screen</item>
         <item>get accounts</item>
         <item>run in background</item>
+        <item>accessibility volume</item>
     </string-array>
 
     <!-- User display names for app ops codes -->
@@ -685,6 +686,7 @@
         <item>Turn on screen</item>
         <item>Get accounts</item>
         <item>Run in background</item>
+        <item>Accessibility volume</item>
     </string-array>
 
     <!-- Titles for the list of long press timeout options. -->

src/com/android/settings/applications/AppOpsState.java

@@ -167,6 +167,7 @@ public class AppOpsState {
                     AppOpsManager.OP_AUDIO_ALARM_VOLUME,
                     AppOpsManager.OP_AUDIO_NOTIFICATION_VOLUME,
                     AppOpsManager.OP_AUDIO_BLUETOOTH_VOLUME,
+                    AppOpsManager.OP_AUDIO_ACCESSIBILITY_VOLUME,
                     AppOpsManager.OP_MUTE_MICROPHONE},
             new boolean[] { false,
                     true,