Update gradle wrapper & gradle plugin.

Enables JDK 11 support.

Bug: None
Change-Id: I12ad7ea6ebc1e7453d59b825b39d2fc55046e5b7
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/182841
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Sami Kalliomäki <sakal@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32013}
diff --git a/DEPS b/DEPS
index f375d78..534113a 100644
--- a/DEPS
+++ b/DEPS
@@ -27,9 +27,9 @@
     'https://chromium.googlesource.com/chromium/src/build@2841b2534425fe42de13eda326fbbb5951e6d014',
   'src/buildtools':
     'https://chromium.googlesource.com/chromium/src/buildtools@ff93f3ea1a7f033d3caf8f60ec1937cc71351419',
-  # Gradle 4.3-rc4. Used for testing Android Studio project generation for WebRTC.
+  # Gradle 6.6.1. Used for testing Android Studio project generation for WebRTC.
   'src/examples/androidtests/third_party/gradle': {
-    'url': 'https://chromium.googlesource.com/external/github.com/gradle/gradle.git@89af43c4d0506f69980f00dde78c97b2f81437f8',
+    'url': 'https://chromium.googlesource.com/external/github.com/gradle/gradle.git@f2d1fb54a951d8b11d25748e4711bec8d128d7e3',
     'condition': 'checkout_android',
   },
   'src/ios': {