Revert "Tie vr flinger to persistent vr mode"

This reverts commit f43d13e4e35ae7d3cdafc4b97c819669d42cef78.

Change-Id: Ib67db8e51b7ea2dbbe6faccce36962bf5b44a6e2
diff --git a/libs/vr/libdisplay/display_client.cpp b/libs/vr/libdisplay/display_client.cpp
index 9a3edef..dcdd994 100644
--- a/libs/vr/libdisplay/display_client.cpp
+++ b/libs/vr/libdisplay/display_client.cpp
@@ -248,6 +248,29 @@
   return 0;
 }
 
+int DisplayClient::EnterVrMode() {
+  auto status = InvokeRemoteMethod<DisplayRPC::EnterVrMode>();
+  if (!status) {
+    ALOGE(
+        "DisplayClient::EnterVrMode: Failed to set display service to Vr mode");
+    return -status.error();
+  }
+
+  return 0;
+}
+
+int DisplayClient::ExitVrMode() {
+  auto status = InvokeRemoteMethod<DisplayRPC::ExitVrMode>();
+  if (!status) {
+    ALOGE(
+        "DisplayClient::ExitVrMode: Failed to revert display service from Vr "
+        "mode");
+    return -status.error();
+  }
+
+  return 0;
+}
+
 std::unique_ptr<DisplaySurfaceClient> DisplayClient::CreateDisplaySurface(
     int width, int height, int format, int usage, int flags) {
   return DisplaySurfaceClient::Create(width, height, format, usage, flags);