Output switcher: change string capitalization.

Every word was capitalized when only the first letter in each string
should be capitalized apart from brand names/abbreviations.

Bug: 311121385
Test: manual
Change-Id: I93379c987db1ec61607429a4fcf3c637741b4333
diff --git a/res/values/strings.xml b/res/values/strings.xml
index b97259d..c2551dd 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -34,7 +34,7 @@
     <string name="screen_recording_announcement">Screen recording started</string>
     <string name="screen_stopped_recording_announcement">Screen recording stopped</string>
 
-    <string name="media_output_dialog_title">Audio Output</string>
+    <string name="media_output_dialog_title">Audio output</string>
     <string name="media_output_dialog_other_devices">Other devices</string>
     <string name="media_output_dialog_pairing_new">Connect another device</string>
 </resources>