Please explain below why you believe CQ is not working.

After a I fixed some unit-test errors reported by few trybots, I fixed the unittests, compiled the unit test locally  and submitted for CQ-Dryrun again and this time all bots fail- with 'Patch failure', though the final failure does not seem to be from the changes in the patch.
The failure looks like the following: 
I noticed this 2 times sofar March 17th & March 10th or so. on the patch 
https://codereview.chromium.org/2684933003/

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third_party/android_tools/google_play_services_basement_java.interface.jar:lib.javava/third_party/gvr-android-sdk/gvr_common_java.interface.jar -sourcepath : -../../chrome/android/java/src/org/chromium/chrome/browser/ntp/snippets/SnippetsBridge.java:295: error: method references are not supported in -source 1.7
        boolean hasFetchAction = additionalAction == ContentSuggestionsAdditionalAction::FETCH;
                                                                                         ^
  (use -source 8 or higher to enable method references)
1 error
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