Add gradle wrappers for Android app builds

Add gradle wrappers for Android app builds

These wrappers are approxiately 56K in size and are the recommened
way to use Gradle.  It also ensures that developers wanting to
build the app don't need install an additional dependency.

Committed: https://skia.googlesource.com/skia/+/8de81806db43c1a1a7bafdb95c77ac4fa4a67f49

[djsollen, 2015-07-08 13:56:40]

djsollen@google.com changed reviewers:
+ scroggo@google.com

[djsollen, 2015-07-08 13:57:40]

djsollen@google.com changed reviewers:
+ joshualitt@google.com

[scroggo, 2015-07-08 15:48:41]

I'm not a good person to review the bash script, and I know very little about
gradle (though probably no one else on the team knows it besides you now...). If
you're looking for a rubber stamp I'm happy to provide it though :) I support
the change in principle.

https://codereview.chromium.org/1227723002/diff/1/platform_tools/android/apps...
File platform_tools/android/apps/gradlew (right):

https://codereview.chromium.org/1227723002/diff/1/platform_tools/android/apps...
platform_tools/android/apps/gradlew:9: # Add default JVM options here. You can
also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
nit: A lot of these lines are rather long (I think over 100 chars). Did you
write this script or was it copied from somewhere?

[djsollen, 2015-07-08 16:40:20]

looking for a rubber stamp as this code is provided directly by gradle and I
haven't modified it in any way.

[scroggo, 2015-07-08 17:41:13]

The CQ bit was checked by scroggo@google.com

[scroggo, 2015-07-08 17:41:13]

lgtm

[commit-bot: I haz the power, 2015-07-08 17:41:30]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1227723002/1

[commit-bot: I haz the power, 2015-07-08 17:50:45]

Committed patchset #1 (id:1) as
https://skia.googlesource.com/skia/+/8de81806db43c1a1a7bafdb95c77ac4fa4a67f49