android: Don't remove notPackage from test runner args.

Bug: 857001
Change-Id: I24219576e71cf636da916ed5119c32c37d5e5394
Reviewed-on: https://chromium-review.googlesource.com/1123268
Commit-Queue: agrieve <agrieve@chromium.org>
Reviewed-by: agrieve <agrieve@chromium.org>
Cr-Commit-Position: refs/heads/master@{#572096}

base/test/android/javatests/src/org/chromium/base/test/BaseChromiumAndroidJUnitRunner.java

@@ -207,7 +207,6 @@ public class BaseChromiumAndroidJUnitRunner extends AndroidJUnitRunner {
         @Override
         public TestRequestBuilder addFromRunnerArgs(RunnerArgs runnerArgs) {
             mExcludedPrefixes.addAll(runnerArgs.notTestPackages);
-            runnerArgs.notTestPackages.clear();
             return super.addFromRunnerArgs(runnerArgs);
         }