Do not wait for configuration when it won't change.

When updating orientation the configuration won't change
if we are rotating 180 degrees. It seems previously there were
redundant calls to setNewConfiguration et. al. clearing this flag.
Those aren't happening anymore, so it doesn't get cleared, leaving
the screen frozen.

Test: Manual repro of bug steps.
Bug: 33956442
Change-Id: I01c612a6d7f920ad7abf64aa97558bebde6bb49c

services/core/java/com/android/server/wm/WindowManagerService.java

@@ -4831,6 +4831,10 @@ public class WindowManagerService extends IWindowManager.Stub
                 + (altOrientation ? " (alt)" : "") + " from " + mRotation
                 + (mAltOrientation ? " (alt)" : "") + ", lastOrientation=" + mLastOrientation);
 
+        if (DisplayContent.deltaRotation(rotation, mRotation) != 2) {
+            mWaitingForConfig = true;
+        }
+
         mRotation = rotation;
         mAltOrientation = altOrientation;
         mPolicy.setRotationLw(mRotation);
@@ -4838,7 +4842,7 @@ public class WindowManagerService extends IWindowManager.Stub
         mWindowsFreezingScreen = WINDOWS_FREEZING_SCREENS_ACTIVE;
         mH.removeMessages(H.WINDOW_FREEZE_TIMEOUT);
         mH.sendEmptyMessageDelayed(H.WINDOW_FREEZE_TIMEOUT, WINDOW_FREEZE_TIMEOUT_DURATION);
-        mWaitingForConfig = true;
+
         dc.setLayoutNeeded();
         final int[] anim = new int[2];
         if (dc.isDimming()) {