fix: Restore image aspect ratio when drag ends (#207)

Previously, ending a drag on an image (that didn't result in dismissing
the fragment) animates the image back in to position restoring the X
axis scale factor.

The Y axis scale factor was not restored, potentially breaking the
image's aspect ratio. Restore the Y axis scale factor to fix this
(`ViewVideoFragment` already handles this correctly).

Fixes #202

app/src/main/java/app/pachli/fragment/ViewImageFragment.kt

@@ -193,7 +193,7 @@ class ViewImageFragment : ViewMediaFragment() {
                     if (abs(view.translationY) > 180) {
                         photoActionsListener.onDismiss()
                     } else {
-                        view.animate().translationY(0f).scaleX(1f).start()
+                        view.animate().translationY(0f).scaleX(1f).scaleY(1f).start()
                     }
                 }
             },