Don't ignore gradlew so we can use it in pipelines

Author: MichielVrins

.gitignore

@@ -52,11 +52,8 @@ build/
 **/example/.dart_tool/
 
 # Android related
-**/android/**/gradle-wrapper.jar
 **/android/.gradle
 **/android/captures/
-**/android/gradlew
-**/android/gradlew.bat
 **/android/local.properties
 **/android/**/GeneratedPluginRegistrant.java
 

example/android/.gitignore

@@ -1,8 +1,5 @@
-gradle-wrapper.jar
 /.gradle
 /captures/
-/gradlew
-/gradlew.bat
 /local.properties
 GeneratedPluginRegistrant.java