Fix capitalization of Face Unlock.

Bug 5447766

Change-Id: I4a91bd00bb09251af170ca054a8aa0bd88c5eec0
diff --git a/res/values/strings.xml b/res/values/strings.xml
index b23e212..b0f2102 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -801,7 +801,7 @@
     <string name="unlock_set_unlock_none_summary">No security</string>
 
     <!-- Title for preference that guides the user through a weak biometric lock [CHAR LIMIT=22] -->
-    <string name="unlock_set_unlock_biometric_weak_title">Face unlock</string>
+    <string name="unlock_set_unlock_biometric_weak_title">Face Unlock</string>
     <!-- Summary for preference that disables unlock security [CHAR LIMIT=45]-->
     <string name="unlock_set_unlock_biometric_weak_summary">Low security, experimental</string>