Fix rotation not updated on phones using 'Legacy API'.

Fixes #10940

app/src/main/java/androidx/camera/view/SignalCameraXModule.java

@@ -512,7 +512,12 @@ final class SignalCameraXModule {
     return rotationDegrees;
   }
 
+  @SuppressLint("UnsafeExperimentalUsageError")
   public void invalidateView() {
+    if (mPreview != null) {
+      mPreview.setTargetRotation(getDisplaySurfaceRotation()); // Fixes issue #10940 (rotation not updated on phones using "Legacy API")
+    }
+
     updateViewInfo();
   }