Disable flaky NQE test in Cronet

Disable flaky NetworkQualityEstimator (NQE) test in Cronet. Also, rename
a few NQE tests.

BUG=710626
CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_cronet_tester

Review-Url: https://codereview.chromium.org/2850873002
Cr-Commit-Position: refs/heads/master@{#468342}

components/cronet/android/BUILD.gn

@@ -682,6 +682,7 @@ android_library("cronet_javatests") {
     "test/javatests/src/org/chromium/net/GetStatusTest.java",
     "test/javatests/src/org/chromium/net/MetricsTestUtil.java",
     "test/javatests/src/org/chromium/net/NetworkChangeNotifierTest.java",
+    "test/javatests/src/org/chromium/net/NQETest.java",
     "test/javatests/src/org/chromium/net/PkpTest.java",
     "test/javatests/src/org/chromium/net/QuicTest.java",
     "test/javatests/src/org/chromium/net/RequestFinishedInfoTest.java",