Update native getDisplayDecorationSupport API

I27f119f927b23052c5fd8f068cbca75338fe7b91 adds new HAL APIs which
provide more detailed info regarding DISPLAY_DECORATION support. Call
the new API and plumb it up to SurfaceComposerClient.

Remove reference to old DisplayCapability.DISPLAY_DECORATION.

Bug: 216644902
Test: manual
Change-Id: I961051c0a660b596039ac04b546040764ee20d34
diff --git a/services/surfaceflinger/DisplayHardware/Hal.h b/services/surfaceflinger/DisplayHardware/Hal.h
index 40c9761..4737034 100644
--- a/services/surfaceflinger/DisplayHardware/Hal.h
+++ b/services/surfaceflinger/DisplayHardware/Hal.h
@@ -135,8 +135,8 @@
             return "AutoLowLatencyMode";
         case aidl::android::hardware::graphics::composer3::DisplayCapability::SUSPEND:
             return "Suspend";
-        case aidl::android::hardware::graphics::composer3::DisplayCapability::DISPLAY_DECORATION:
-            return "DisplayDecoration";
+        case aidl::android::hardware::graphics::composer3::DisplayCapability::DISPLAY_IDLE_TIMER:
+            return "DisplayIdleTimer";
         default:
             return "Unknown";
     }