Add OpenSL ES enable setting to AppRTCDemo.

webrtc/examples/androidapp/res/values/strings.xml

Index: webrtc/examples/androidapp/res/values/strings.xml
diff --git a/webrtc/examples/androidapp/res/values/strings.xml b/webrtc/examples/androidapp/res/values/strings.xml
index b3c55b438e1791fc49bcdfc66f96097a8dabfc79..951f65a1a41bd263ef5ef28176312e550c397107 100644
--- a/webrtc/examples/androidapp/res/values/strings.xml
+++ b/webrtc/examples/androidapp/res/values/strings.xml
@@ -97,14 +97,14 @@
     <string name="pref_noaudioprocessing_dlg">Disable audio processing pipeline.</string>
     <string name="pref_noaudioprocessing_default">false</string>
 
+    <string name="pref_opensles_key">opensles_preference</string>
+    <string name="pref_opensles_title">Use OpenSL ES for audio playback.</string>
+    <string name="pref_opensles_dlg">Use OpenSL ES for audio playback.</string>
+    <string name="pref_opensles_default">false</string>
+
     <string name="pref_miscsettings_key">misc_settings_key</string>
     <string name="pref_miscsettings_title">Miscellaneous settings.</string>
 
-    <string name="pref_cpu_usage_detection_key">cpu_usage_detection</string>
-    <string name="pref_cpu_usage_detection_title">CPU overuse detection.</string>
-    <string name="pref_cpu_usage_detection_dlg">Adapt transmission to CPU status.</string>
-    <string name="pref_cpu_usage_detection_default" translatable="false">true</string>
-
     <string name="pref_room_server_url_key">room_server_url_preference</string>
     <string name="pref_room_server_url_title">Room server URL.</string>
     <string name="pref_room_server_url_dlg">Enter a room server URL.</string>