fix: use observable platformLocale to resolve NonObservableLocale lint errors

Author: kikoso

maps-app/src/main/java/com/google/maps/android/compose/GroundOverlayActivity.kt

@@ -156,7 +156,7 @@ fun GroundOverlayControls(
                 Text(text = "Visible", modifier = Modifier.weight(1f))
                 Switch(checked = isVisible, onCheckedChange = onVisibilityChange)
             }
-            Text(text = "Transparency: ${String.format(Locale.getDefault(), "%.2f", transparency)}")
+            Text(text = "Transparency: ${String.format(androidx.compose.ui.text.intl.Locale.current.platformLocale, "%.2f", transparency)}")
             Slider(
                 value = transparency,
                 onValueChange = onTransparencyChange,

maps-app/src/main/java/com/google/maps/android/compose/markerexamples/MarkerClusteringActivity.kt

@@ -205,7 +205,7 @@ private fun CustomUiClustering(items: List<MyItem>) {
         clusterContent = { cluster ->
             CircleContent(
                 modifier = Modifier.size(40.dp),
-                text = "%,d".format(Locale.getDefault(), cluster.size),
+                text = "%,d".format(androidx.compose.ui.text.intl.Locale.current.platformLocale, cluster.size),
                 color = Color.Blue,
             )
         },
@@ -252,7 +252,7 @@ fun CustomRendererClustering(items: List<MyItem>) {
         clusterContent = { cluster ->
             CircleContent(
                 modifier = Modifier.size(40.dp),
-                text = "%,d".format(Locale.getDefault(), cluster.size),
+                text = "%,d".format(androidx.compose.ui.text.intl.Locale.current.platformLocale, cluster.size),
                 color = Color.Green,
             )
         },