Scaffold back arrow should be pointing right when rtl

Mirror the arrow when rtl to fix.

Fix: 266190692
Test: Manually with Settings
Change-Id: Ia4dffcdaebf0ff1dd794b59390bea467b92417e9

packages/SettingsLib/Spa/spa/src/com/android/settingslib/spa/widget/scaffold/Actions.kt

@@ -24,7 +24,12 @@ import androidx.compose.material.icons.outlined.FindInPage
 import androidx.compose.material3.Icon
 import androidx.compose.material3.IconButton
 import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.composed
+import androidx.compose.ui.draw.scale
+import androidx.compose.ui.platform.LocalLayoutDirection
 import androidx.compose.ui.res.stringResource
+import androidx.compose.ui.unit.LayoutDirection
 import com.android.settingslib.spa.framework.compose.LocalNavController
 
 /** Action that navigates back to last page. */
@@ -50,6 +55,7 @@ private fun BackAction(contentDescription: String, onClick: () -> Unit) {
         Icon(
             imageVector = Icons.Outlined.ArrowBack,
             contentDescription = contentDescription,
+            modifier = Modifier.autoMirrored(),
         )
     }
 }
@@ -75,3 +81,10 @@ internal fun ClearAction(onClick: () -> Unit) {
         )
     }
 }
+
+private fun Modifier.autoMirrored() = composed {
+    when (LocalLayoutDirection.current) {
+        LayoutDirection.Rtl -> scale(scaleX = -1f, scaleY = 1f)
+        else -> this
+    }
+}