samsung: doze: Add service for using proximity sensor for wake-up

* Added custom service that uses proximity sensor in wake-up mode
  to trigger display on
* If more sensor triggers are suitable to use, they can be added
  to the service

Change-Id: Id0849fb5c17ff569d771a19cebfc579dc93dbc48
diff --git a/doze/proguard.flags b/doze/proguard.flags
new file mode 100644
index 0000000..3bb1f2c
--- /dev/null
+++ b/doze/proguard.flags
@@ -0,0 +1,3 @@
+-keep class com.cyanogenmod.settings.device.* {
+  *;
+}