Add --canary flag to gradle project test and update gradle.

DEPS

 # This file contains dependencies for WebRTC.
 
 vars = {
   'chromium_git': 'https://chromium.googlesource.com',
   'chromium_revision': '589cc956539eab48fa9784d76a69ffada83c8a52',
   'boringssl_git': 'https://boringssl.googlesource.com',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.
   'swarming_revision': '42721e128da760b345ab60d7cf34e300269112d7',
@@ skipping 96 matching lines @@
       Var('chromium_git') + '/external/mockito/mockito.git' + '@' + 'de83ad4598ad4cf5ea53c69a8a8053780b04b850',
     'src/third_party/requests/src':
       Var('chromium_git') + '/external/github.com/kennethreitz/requests.git' + '@' + 'f172b30356d821d180fa4ecfa3e71c7274a32de4',
     'src/third_party/robolectric/robolectric':
       Var('chromium_git') + '/external/robolectric.git' + '@' + '0ccaf33cf6a6d98cbef7d0f3604fda45b13cce54',
     'src/third_party/ub-uiautomator/lib':
       Var('chromium_git') + '/chromium/third_party/ub-uiautomator.git' + '@' + '00270549ce3161ae72ceb24712618ea28b4f9434',
     # Gradle 3.5.0. Used for testing Android Studio project generation for WebRTC.
     'src/webrtc/examples/androidtests/third_party/gradle':
       Var('chromium_git') + '/external/github.com/gradle/gradle.git' + '@' +
-      'b762622a185d59ce0cfc9cbc6ab5dd22469e18a6',
+      '941559e020f6c357ebb08d5c67acdb858a3defc2',
   },
   'ios': {
     'src/ios':
       Var('chromium_git') + '/chromium/src/ios' + '@' + '043998ae0932b200c153de56f551fc6e0f226636',
   },
   'unix': {
     'src/third_party/lss':
       Var('chromium_git') + '/linux-syscall-support.git' + '@' + Var('lss_revision'),
   },
   'win': {
@@ skipping 415 matching lines @@
       ],
     },
   ],
 }
 recursedeps = [
   # buildtools provides clang_format, libc++, and libc++abi.
   'src/buildtools',
   # android_tools manages the NDK.
   'src/third_party/android_tools',
 ]