[2/2] OmniGears: Clock tweaks

PS5:
- added slims clock and date customizations for status bar
PS6:
- Remove color preference
- Refactored code
PS7/8:
- Fixed build
PS9:
- Fixed FC
PS10:
- Display date style & format if it is disabled

Base: https://gerrit.omnirom.org/#/c/4938/

Change-Id: I6d9a1db1717cbe08ed275c8cca21ec2ace7e96c4
diff --git a/res/xml/bars_settings.xml b/res/xml/bars_settings.xml
index 60ae2a6..9b1d78c 100644
--- a/res/xml/bars_settings.xml
+++ b/res/xml/bars_settings.xml
@@ -71,6 +71,11 @@
                 android:summary="@string/qs_configurable_summary"
                 android:persistent="false"/>
 
+        <PreferenceScreen
+                android:fragment="org.omnirom.omnigears.slim.StatusBarClockStyle"
+                android:key="clock_style_pref"
+                android:title="@string/status_bar_clock" />
+
     </PreferenceCategory>
 
     <!-- Navigation bar -->