camera: Use "classic" autofocus mode by default.

CAF is nice, but confuses some uses who are expecting the old behavior
(although it should be familiar to Sense users). Switch to classic AF by
default to prevent "my camera won't stop focusing!" bugreports.

Change-Id: I7330f27a1f1e9a9710867abda9ce2e4a8ad4b725

res/values/strings.xml

@@ -220,7 +220,7 @@
     <string name="pref_camera_jpegquality_entry_normal">Normal</string>
 
     <!-- Default focus mode setting.-->
-    <string name="pref_camera_focusmode_default" translatable="false">auto</string>
+    <string name="pref_camera_focusmode_default" translatable="false">classic</string>
     <string name="pref_camera_video_focusmode_default" translatable="false">infinity</string>
 
     <!-- Settings screen, Focus mode title -->