Upgrade Gradle to 5.5 (#25461)

Summary:
Upgrade Gradle to 5.5, changelog is available here: https://docs.gradle.org/5.5/release-notes.html

```
./gradlew wrapper --gradle-version 5.5 --distribution-type all
```

## Changelog

[Android] [Changed] - Upgrade Gradle to 5.5
Pull Request resolved: https://github.com/facebook/react-native/pull/25461

Test Plan: Ran RNTester, everything is working as expected.

Differential Revision: D16106927

Pulled By: cpojer

fbshipit-source-id: 3fca03b6c7ad8989a9a1c707dea980c831cc1872

gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

template/android/gradle/wrapper/gradle-wrapper.properties

@@ -1,5 +1,5 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.5-all.zip
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists