[share] plugin: Update gradle version of example for Android (flutter#2555)

Fixes [TAG] Warnings and errors caused as generated on Android Studio build terminal while buidling.

Author: jddeep

packages/share/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 0.6.3+7
+
+* Updated gradle version of example.
+
 ## 0.6.3+6
 
 * Make the pedantic dev_dependency explicit.

packages/share/example/android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-4.10.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-5.4.1-all.zip

packages/share/pubspec.yaml

@@ -2,7 +2,7 @@ name: share
 description: Flutter plugin for sharing content via the platform share UI, using
   the ACTION_SEND intent on Android and UIActivityViewController on iOS.
 homepage: https://github.com/flutter/plugins/tree/master/packages/share
-version: 0.6.3+6
+version: 0.6.3+7
 
 flutter:
   plugin: