Fix for CameraView blacks outs and Aspect ratio iteration issue google#125

Author: luowei

library/src/main/api14/com/google/android/cameraview/Camera1.java

@@ -26,6 +26,7 @@
 import java.util.List;
 import java.util.Set;
 import java.util.SortedSet;
+import java.util.TreeSet;
 import java.util.concurrent.atomic.AtomicBoolean;
 
 
@@ -150,7 +151,8 @@ int getFacing() {
     @Override
     Set<AspectRatio> getSupportedAspectRatios() {
         SizeMap idealAspectRatios = mPreviewSizes;
-        for (AspectRatio aspectRatio : idealAspectRatios.ratios()) {
+        Set<AspectRatio> ratios = new TreeSet<>(idealAspectRatios.ratios());
+        for (AspectRatio aspectRatio : ratios) {
             if (mPictureSizes.sizes(aspectRatio) == null) {
                 idealAspectRatios.remove(aspectRatio);
             }

library/src/main/java/com/google/android/cameraview/CameraView.java

@@ -243,6 +243,10 @@ protected void onRestoreInstanceState(Parcelable state) {
      */
     public void start() {
         if (!mImpl.start()) {
+            if (mImpl.getView() != null) {
+                this.removeView(mImpl.getView());
+            }
+
             //store the state ,and restore this state after fall back o Camera1
             Parcelable state = onSaveInstanceState();
             // Camera2 uses legacy hardware layer; fall back to Camera1