Repository: flutter
Issue: [google_maps_flutter] GoogleMap blinks in BottomNavigationBar  on Android
Labels: platform-android,framework,f: material design,p: maps,package,has reproducible steps,P2,found in release: 1.20,found in release: 2.0,found in release: 2.2,team-android,triaged-android

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`BottomNavigationBar` size glitches when switching to tab with `GoogleMap` widget. Only reproduces on physical iOS device (iphone 5s, debug and profile build)

![](https://github.com/nulleof/flutter-map-bottom-tabs-test/raw/master/example.gif)

## Steps to Reproduce
1. Clone example repo https://github.com/nulleof/flutter-map-bottom-tabs-test
2. Put your Google sdk key to `ios/Runner/AppDelegate.m`
3. Run on physical device
4. When you switch to tab with map, you see blinking double sized bottom nav bar

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## Logs

<!-- Finally, paste the output of running `flutter doctor -v` here. -->


<details> 
<summary>flutter doctor -v</summary> 

```bash
[✓] Flutter (Channel stable, v1.2.1, on Mac OS X 10.13.4 17E199, locale en-RU)
    • Flutter version 1.2.1 at /Users/nulleof/Development/flutter
    • Framework revision 8661d8aecd (3 weeks ago), 2019-02-14 19:19:53 -0800
    • Engine revision 3757390fa4
    • Dart version 2.1.2 (build 2.1.2-dev.0.0 0a7dcf17eb)

[✓] Android toolchain - develop for Android devices (Android SDK version 28.0.3)
    • Android SDK at /Users/nulleof/Library/Android/sdk
    • Android NDK location not configured (optional; useful for native profiling support)
    • Platform android-28, build-tools 28.0.3
    • ANDROID_HOME = /Users/nulleof/Library/Android/sdk
    • Java binary at: /Applications/Android Studio.app/Contents/jre/jdk/Contents/Home/bin/java
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)
    • All Android licenses accepted.

[✓] iOS toolchain - develop for iOS devices (Xcode 9.4.1)
    • Xcode at /Applications/Xcode.app/Contents/Developer
    • Xcode 9.4.1, Build version 9F2000
    • ios-deploy 1.9.4
    • CocoaPods version 1.5.2

[✓] Android Studio (version 3.3)
    • Android Studio at /Applications/Android Studio.app/Contents
    • Flutter plugin version 33.0.1
    • Dart plugin version 182.5215
    • Java version OpenJDK Runtime Environment (build 1.8.0_152-release-1248-b01)

[✓] Connected device (2 available)
    • Custom Phone, 8 0, API 26, 768x1280 • 192.168.56.101:5555                  • android-x86 • Android 8.0.0 (API 26)
    • iPhone SE                           • 88B95741-8E98-4FB9-B309-740F2570A3CE • ios         • iOS 11.4 (simulator)
```
	
</details>