Change "ringer volume" to "ring volume"

Bug: 29565896

Changes all occurrences of "ringer volume" to "ring volume" in
Settings string file, including in comments.

Change-Id: Iad197dbbbbec16120fcd3ac835c1647a7f4c0c32
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 8c3532d..7896bbb 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -2007,7 +2007,7 @@
     <!-- Sound settings screen, music effects title [CHAR LIMIT=30]-->
     <string name="musicfx_title">Music effects</string>
     <!-- Sound settings screen, setting option name -->
-    <string name="ring_volume_title">Ringer volume</string>
+    <string name="ring_volume_title">Ring volume</string>
     <!-- Sound settings screen, setting option name checkbox -->
     <string name="vibrate_in_silent_title">Vibrate when silent</string>
     <!-- Sound settings screen, setting option name -->
@@ -2051,7 +2051,7 @@
     <string name="volume_notification_description">Notifications</string>
     <!-- Volume description for alarm volume -->
     <string name="volume_alarm_description">Alarms</string>
-    <!-- Image description for ringer volume mute button. -->
+    <!-- Image description for ring volume mute button. -->
     <string name="volume_ring_mute">Mute ringtone &amp; notifications</string>
     <!-- Image description for media volume mute button. -->
     <string name="volume_media_mute">Mute music &amp; other media</string>
@@ -5916,10 +5916,10 @@
 
     <!-- Sounds and Notification -->
     <!-- Sound: Dashboard summary. [CHAR LIMIT=100] -->
-    <string name="sound_settings_summary">Ringer volume at <xliff:g id="percentage" example="2">%1$s</xliff:g></string>
+    <string name="sound_settings_summary">Ring volume at <xliff:g id="percentage" example="2">%1$s</xliff:g></string>
 
     <!-- Sound: Dashboard summary example used in Setup Wizard preview screen. [CHAR LIMIT=100] -->
-    <string name="sound_settings_example_summary">Ringer volume at 80%</string>
+    <string name="sound_settings_example_summary">Ring volume at 80%</string>
 
     <!-- Sound: Title for the option managing media volume. [CHAR LIMIT=30] -->
     <string name="media_volume_option_title">Media volume</string>
@@ -5927,7 +5927,7 @@
     <!-- Sound: Title for the option managing alarm volume. [CHAR LIMIT=30] -->
     <string name="alarm_volume_option_title">Alarm volume</string>
 
-    <!-- Sound: Title for the option managing ringer volume. [CHAR LIMIT=30] -->
+    <!-- Sound: Title for the option managing ring volume. [CHAR LIMIT=30] -->
     <string name="ring_volume_option_title">Ring volume</string>
 
     <!-- Sound: Title for the option managing notification volume. [CHAR LIMIT=30] -->