feat: expose map zoom limits

maps-app/src/androidTest/java/com/google/maps/android/compose/GoogleMapViewTests.kt

@@ -207,6 +207,22 @@ class GoogleMapViewTests {
         }
     }
 
+    @Test
+    fun testCameraZoomLevels() {
+        assertThat(cameraPositionState.minZoomLevel).isNull()
+        assertThat(cameraPositionState.maxZoomLevel).isNull()
+
+        initMap()
+
+        composeTestRule.runOnUiThread {
+            val minZoomLevel = cameraPositionState.minZoomLevel
+            val maxZoomLevel = cameraPositionState.maxZoomLevel
+            assertThat(minZoomLevel).isNotNull()
+            assertThat(maxZoomLevel).isNotNull()
+            assertThat(minZoomLevel!!).isAtMost(maxZoomLevel!!)
+        }
+    }
+
     @Test(expected = IllegalStateException::class)
     fun testMarkerStateCannotBeReused() {
         initMap {
@@ -314,4 +330,4 @@ class GoogleMapViewTests {
 
         assertionBlock()
     }
-}
+}

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

@@ -112,6 +112,20 @@ public class CameraPositionState private constructor(
     public val projection: Projection?
         get() = map?.projection
 
+    /**
+     * The minimum zoom level for the currently bound map, or `null` if this state is not currently
+     * bound to a [GoogleMap].
+     */
+    public val minZoomLevel: Float?
+        get() = map?.minZoomLevel
+
+    /**
+     * The maximum zoom level for the currently bound map, or `null` if this state is not currently
+     * bound to a [GoogleMap].
+     */
+    public val maxZoomLevel: Float?
+        get() = map?.maxZoomLevel
+
     /**
      * Local source of truth for the current camera position.
      * While [map] is non-null this reflects the current position of [map] as it changes.