[ChromeDriver] Disable failing tests on Android

Disabling following tests on Android.
Test ChromeDriverTest.testGenerateTestReport not yet supported
for Chrome M69 and M70, so we disable for Android Stable and Beta
as they are currently running Chrome M69 and M70 respectively

Test ChromeDriverTest.testTakeElementScreenshotInIframe fails due to
the known ChromeDriver bug 2579

Change-Id: I3d20483faea56a0f035739506b253215da5e3ef5
Reviewed-on: https://chromium-review.googlesource.com/c/1285075Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: Artur Khachatryan <khachatryan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600174}

chrome/test/chromedriver/test/run_py_tests.py

@@ -237,6 +237,7 @@ _ANDROID_NEGATIVE_FILTER['chrome'] = (
         'LaunchDesktopTest.*',
         # https://bugs.chromium.org/p/chromedriver/issues/detail?id=2579
         'ChromeDriverTest.testTakeElementScreenshot',
+        'ChromeDriverTest.testTakeElementScreenshotInIframe',
     ]
 )
 _ANDROID_NEGATIVE_FILTER['chrome_stable'] = (
@@ -248,6 +249,8 @@ _ANDROID_NEGATIVE_FILTER['chrome_stable'] = (
         'ChromeDriverTest.testGetWindowHandles',
         'ChromeDriverTest.testShouldHandleNewWindowLoadingProperly',
         'ChromeDriverTest.testSwitchToWindow',
+        # Feature not yet supported in this version
+        'ChromeDriverTest.testGenerateTestReport',
     ]
 )
 _ANDROID_NEGATIVE_FILTER['chrome_beta'] = (
@@ -257,6 +260,8 @@ _ANDROID_NEGATIVE_FILTER['chrome_beta'] = (
         'ChromeDriverTest.testGetWindowHandles',
         'ChromeDriverTest.testShouldHandleNewWindowLoadingProperly',
         'ChromeDriverTest.testSwitchToWindow',
+        # Feature not yet supported in this version
+        'ChromeDriverTest.testGenerateTestReport',
     ]
 )
 _ANDROID_NEGATIVE_FILTER['chromium'] = (