Empty bfcache's android_browsertests and content_shell_test_apk filters.

I'm not deleting them because the set up is a bit complex and we can just
leave them empty and ready to use if needed for now.

All tests pass when built with is_component_build=false.

android_browsertests
https://chromium-swarm.appspot.com/task?id=480617e093827910

content_shell_test_apk
https://chromium-swarm.appspot.com/task?id=48062ebc37df7010

chrome_public_test_apk
https://chromium-swarm.appspot.com/task?id=48059c46554c9d10

content_browsertests is more complex and will come in a later CL.

Bug: 1016230
Change-Id: I7a2a0af9906589903dadf2fd0334fec9415497d0
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1872071Reviewed-by: Alexander Timin <altimin@chromium.org>
Commit-Queue: Fergal Daly <fergal@chromium.org>
Cr-Commit-Position: refs/heads/master@{#708073}

testing/buildbot/filters/bfcache.android_browsertests.filter

-# Every android_browsertests are failing on the android-bfcache-debug bot and
-# are passing locally.
-# See https://crbug.com/1014981
-#
-# This filter enables only one test. This prevents the bot from timing out.
-AndroidBrowserTest.Smoke
+# These tests currently fail when run with --enable-features=BackForwardCache

testing/buildbot/filters/bfcache.chrome_public_test_apk.filter

@@ -6,21 +6,3 @@
 -org.chromium.chrome.browser.FeaturesAnnotationsTest.testFeaturesAddToExistingFlags
 -org.chromium.chrome.browser.FeaturesAnnotationsTest.testFeaturesSetExistingFlags
 -org.chromium.chrome.browser.FeaturesAnnotationsTest.testFeaturesDoNotRemoveExistingFlags
-
-# Failing on bfcache-android-debug and 4.4.4 locally. See https://crbug.com/1006267
--org.chromium.chrome.browser.SafeBrowsingTest.interstitialPage
--org.chromium.chrome.browser.WarmupManagerTest.testCreateAndTakeSpareRenderer
--org.chromium.chrome.browser.customtabs.DetachedResourceRequestTest.testSafeBrowsingSubresource
-# This one is flaky
--org.chromium.chrome.browser.customtabs.DetachedResourceRequestTest.testSafeBrowsingSubresourceBeforeNative
--org.chromium.chrome.browser.externalnav.UrlOverridingTest.testRedirectionFromIntent
--org.chromium.chrome.browser.incognito.IncognitoTabLauncherTest.testLaunchIncognitoNewTab
--org.chromium.chrome.browser.incognito.IncognitoTabLauncherTest.testLaunchIncognitoNewTab_omniboxFocused
--org.chromium.chrome.browser.infobar.InfoBarTest.testInfoBarForGeolocationDisappearsOnBack
--org.chromium.chrome.browser.profiling_host.ProfilingProcessHostAndroidTest.testModeBrowser
--org.chromium.chrome.browser.tabmodel.IncognitoTabModelTest.testRecreateInIncognito
--org.chromium.chrome.browser.toolbar.top.BrandColorTest.testBrandColorInterstitial
-# These 3 are flaky
--org.chromium.chrome.browser.offlinepages.OfflinePageAutoFetchTest
--org.chromium.chrome.browser.notifications.NotificationPlatformBridgeIntentTest.testLaunchNotificationPreferencesForCategory
--org.chromium.chrome.browser.notifications.NotificationPlatformBridgeIntentTest.testLaunchNotificationPreferencesForWebsite

testing/buildbot/filters/bfcache.content_shell_test_apk.filter

 # These tests currently fail when run with --enable-features=BackForwardCache
-
-# Fails for unknown reason.
--org.chromium.content.browser.InterstitialPageTest.testCloseInterstitial