Aperture: Make sure to stop doing stuff when we call Activity.finish()

Change-Id: I198d2209b9a4a3c844f046898a78e868bdfe0539
diff --git a/app/src/main/java/org/lineageos/aperture/CameraActivity.kt b/app/src/main/java/org/lineageos/aperture/CameraActivity.kt
index a08b766..e036797 100644
--- a/app/src/main/java/org/lineageos/aperture/CameraActivity.kt
+++ b/app/src/main/java/org/lineageos/aperture/CameraActivity.kt
@@ -608,6 +608,7 @@
                     this, getString(R.string.camcorder_unsupported_toast), Toast.LENGTH_LONG
                 ).show()
                 finish()
+                return
             }
             // Fallback to photo mode
             cameraMode = CameraMode.PHOTO