Do not issue config change command when not needed

This caused a but where WindowManager was blocked on this to perform a
layout, leading to delays in screen wake-ups.

Bug: 24383169
Change-Id: I42bc08dae9057060f09c301328bb4839a970c597

services/core/java/com/android/server/display/LocalDisplayAdapter.java

@@ -544,7 +544,7 @@ final class LocalDisplayAdapter extends DisplayAdapter {
                     physIndex = findDisplayInfoIndexLocked(colorTransformId, modeId);
                 }
             }
-            if (physIndex > 0 && mActivePhysIndex == physIndex) {
+            if (mActivePhysIndex == physIndex) {
                 return;
             }
             SurfaceControl.setActiveConfig(getDisplayTokenLocked(), physIndex);