Cherish: Add Flashlight blink on incoming calls [3/3]

- Thanks to @Shripal17 for suggesting list preference
  instead of a toggle
- Add a device specific flashlight check

@idoybh (DerpFest) edits: The current check is for isRingerAudiable and
not for DND - change var names and strings so it'll not mislead any
future developer or any user

res/drawable/ic_flashlight.xml

@@ -0,0 +1,7 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="?android:attr/colorControlNormal" android:pathData="M9,10L6,5H18L15,10H9M18,4H6V2H18V4M9,22V11H15V22H9M12,13A1,1 0 0,0 11,14A1,1 0 0,0 12,15A1,1 0 0,0 13,14A1,1 0 0,0 12,13Z" />
+</vector>

res/values/cherish_arrays.xml

@@ -652,4 +652,19 @@
         <item>#FF00FF00</item>
         <item>#FFFF0000</item>
     </string-array>
+	
+	<!-- Blink flashlight for incoming calls -->
+    <string-array name="flashlight_on_call_entries">
+        <item>@string/flashlight_on_call_disabled</item>
+        <item>@string/flashlight_on_call_ringer</item>
+        <item>@string/flashlight_on_call_silent</item>
+        <item>@string/flashlight_on_call_always</item>
+    </string-array>
+
+    <string-array name="flashlight_on_call_values">
+        <item>0</item>
+        <item>1</item>
+        <item>2</item>
+        <item>3</item>
+    </string-array>
 </resources>

res/values/cherish_strings.xml

@@ -735,4 +735,10 @@
     <string name="center_notification_headers_title">Center notification headers</string>
     <string name="center_notification_headers_summary">Whether to Center R style notification headers (Requires a SystemUI restart)</string>
 
+    <!-- Blink flashlight for incoming calls -->
+    <string name="flashlight_on_call_title">Blink Flashlight for call</string>
+    <string name="flashlight_on_call_disabled">Disabled</string>
+    <string name="flashlight_on_call_ringer">Only in ringer mode</string>
+    <string name="flashlight_on_call_silent">Only when ringer is silent</string>
+    <string name="flashlight_on_call_always">Always</string>
 </resources>

res/xml/cherish_settings_notifications.xml

@@ -32,6 +32,13 @@
         android:dependency="notification_headers"
         android:defaultValue="true" />
 
+ <com.cherish.settings.preferences.SystemSettingSwitchPreference
+            android:key="force_expanded_notifications"
+	    android:icon="@drawable/ic_notification"
+            android:title="@string/force_expanded_notifications_title"
+            android:summary="@string/force_expanded_notifications_summary"
+            android:defaultValue="false" />
+
  <Preference
         android:key="charging_light"
         android:icon="@drawable/ic_battery_almostfull"
@@ -58,11 +65,12 @@
             android:defaultValue="false" />
     </PreferenceCategory>
 
+  <com.cherish.settings.preferences.SystemSettingListPreference
+            android:key="flashlight_on_call"
+            android:icon="@drawable/ic_flashlight"
+            android:title="@string/flashlight_on_call_title"
+            android:entries="@array/flashlight_on_call_entries"
+            android:entryValues="@array/flashlight_on_call_values"
+            android:defaultValue="0" />
 
- <com.cherish.settings.preferences.SystemSettingSwitchPreference
-            android:key="force_expanded_notifications"
-			android:icon="@drawable/ic_notification"
-            android:title="@string/force_expanded_notifications_title"
-            android:summary="@string/force_expanded_notifications_summary"
-            android:defaultValue="false" />
 </PreferenceScreen>