[v5] android - Source image disappears when going back

Hello,
First of all thanks for this nice lib 👍
I'm using it with the following versions:
```json
"@react-navigation/native": "^5.3.2",
"@react-navigation/stack": "^5.3.5",
"react-navigation-shared-element": "^5.0.0-alpha1",
"react-native-shared-element": "^0.7.0",
```

It's working well, but I have a small weird bug happening on android. When I press an Icon on top of a shared element to go back, the source element doesn't shows up.

If I press the OS back button, or any element doing a `navigation.goBack` provided this element is not on top of the `SharedElement`, it's working ok.

Here is a screen record:
https://imgur.com/a/mUn8HfU

As you can see, when I click on the red bordered arrow on top the source image of the transition doesn't show up. If I click on the "link" (Voir sur la carte) below the image, the source image shows up. (both Arrow and "link" triggers a `navigation.goBack`)

Any idea?

PS: my `react-native info`:
```
info Fetching system and libraries information...
System:
OS: macOS Mojave 10.14.6
CPU: (8) x64 Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz
Memory: 3.90 GB / 16.00 GB
Shell: 5.3 - /bin/zsh
Binaries:
Node: 12.14.1 - ~/.nvm/versions/node/v12.14.1/bin/node
Yarn: 1.22.4 - /usr/local/bin/yarn
npm: 6.13.4 - ~/.nvm/versions/node/v12.14.1/bin/npm
Watchman: Not Found
Managers:
CocoaPods: 1.9.1 - /usr/local/bin/pod
SDKs:
iOS SDK:
Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
Android SDK: Not Found
IDEs:
Android Studio: 3.6 AI-192.7142.36.36.6241897
Xcode: 11.2.1/11B500 - /usr/bin/xcodebuild
Languages:
Java: 1.8.0_242 - /usr/bin/javac
Python: 2.7.10 - /usr/bin/python
npmPackages:
@react-native-community/cli: Not Found
react: 16.13.1 => 16.13.1
react-native: 0.62.2 => 0.62.2
npmGlobalPackages:
*react-native*: Not Found
```

No source files or tests are named. Reproduce the Android transition with the listed React Navigation and React Native versions, comparing the top arrow's navigation.goBack with the link's navigation.goBack; the issue is resolved when the source image appears for both paths.

Written by the indexing model from the issue text.