[2/2] OmniGears: generic proximity check for wakeup events

for devices that support deep sleep with active proximity
sensor event listener. Does cover power button and volume
button wake events

Change-Id: I27812a1fda8739272456609e89ab193e52ae6de1
diff --git a/res/xml/button_settings.xml b/res/xml/button_settings.xml
index bdbe49b..2d2360a 100644
--- a/res/xml/button_settings.xml
+++ b/res/xml/button_settings.xml
@@ -89,6 +89,12 @@
             android:summary="@string/long_press_power_torch_summary"
             android:defaultValue="false" />
 
+        <org.omnirom.omnigears.preference.SystemSettingSwitchPreference
+            android:key="system_proxi_check_enabled"
+            android:title="@string/system_proxi_check_enabled_title"
+            android:summary="@string/system_proxi_check_enabled_summary"
+            android:defaultValue="false"/>
+
     </PreferenceCategory>
 
     <PreferenceCategory