Aperture: Fix front camera intent preview mirroring

With image capture intents, properly mirror the preview image for a
front-facing camera photo when the "Mirror front camera" feature is on,
as is the default. Otherwise, in addition to not being mirrored like
the live preview, the image preview may appear to be upside down.

Issue: calyxos#2642
Change-Id: I49b6256750ac821c6eefdd28ed7a4c2ec1c519c9

app/src/main/java/org/lineageos/aperture/ui/CapturePreviewLayout.kt

@@ -9,6 +9,7 @@ import android.content.Context
 import android.graphics.BitmapFactory
 import android.net.Uri
 import android.util.AttributeSet
+import android.util.Log
 import android.widget.ImageButton
 import android.widget.ImageView
 import androidx.camera.camera2.interop.ExperimentalCamera2Interop
@@ -116,15 +117,22 @@ class CapturePreviewLayout(context: Context, attrs: AttributeSet?) : ConstraintL
             MediaType.PHOTO -> {
                 if (uri != null) {
                     imageView.rotation = 0f
+                    imageView.scaleX = 1f
                     imageView.setImageURI(uri)
                 } else {
                     val inputStream = photoInputStream!!
                     val transform = ExifUtils.getTransform(inputStream)
                     inputStream.mark(Int.MAX_VALUE)
                     val bitmap = BitmapFactory.decodeStream(inputStream)
                     inputStream.reset()
+                    Log.d(LOG_TAG, "Preview transform=$transform screenRotation=$screenRotation")
                     imageView.rotation =
                         transform.rotation.offset.toFloat() - screenRotation.offset
+                    imageView.scaleX = if (transform.mirror) {
+                        -1f
+                    } else {
+                        1f
+                    }
                     imageView.setImageBitmap(bitmap)
                 }
             }
@@ -161,4 +169,8 @@ class CapturePreviewLayout(context: Context, attrs: AttributeSet?) : ConstraintL
         cancelButton.smoothRotate(compensationValue)
         confirmButton.smoothRotate(compensationValue)
     }
+
+    companion object {
+        private const val LOG_TAG = "Aperture"
+    }
 }