sdm: Add support to enable/disable screen updates

- Add support to enable/disable screen updates.
- Remove redundant updating of backlight value in HWC wrapper.

CRs-Fixed: 888000
Change-Id: Idddf2ebadb200fe205bd29b36d3fe145f35c0d38
diff --git a/libqservice/QServiceUtils.h b/libqservice/QServiceUtils.h
index fbad484..73b2b18 100644
--- a/libqservice/QServiceUtils.h
+++ b/libqservice/QServiceUtils.h
@@ -62,21 +62,12 @@
 // ----------------------------------------------------------------------------
 // Convenience wrappers that clients can call
 // ----------------------------------------------------------------------------
-inline android::status_t securing(uint32_t startEnd) {
-    return sendSingleParam(qService::IQService::SECURING, startEnd);
-}
-
-inline android::status_t unsecuring(uint32_t startEnd) {
-    return sendSingleParam(qService::IQService::UNSECURING, startEnd);
-}
-
 inline android::status_t screenRefresh() {
     return sendSingleParam(qService::IQService::SCREEN_REFRESH, 1);
 }
 
-// TODO(user): Need to rename this wrapper name
 inline android::status_t toggleScreenUpdate(uint32_t on) {
-    return sendSingleParam(qService::IQService::CONTROL_BACKLIGHT, on);
+    return sendSingleParam(qService::IQService::TOGGLE_SCREEN_UPDATES, on);
 }
 
 inline android::status_t setExtOrientation(uint32_t orientation) {