Disable failing tests on android-go_webview-perf

Disabling the following tests on android-go_webview-perf:
* system_health.common_mobile/browse:media:youtube:2019
* system_health.common_mobile/browse:news:nytimes:2019
* system_health.common_mobile/browse:news:cnn:2018

TBR=crouleau@chromium.org
NOTRY=true

Bug: 1026822
Change-Id: I2581e3c21158edff2563de628bfa41de7349271d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1927216Reviewed-by: John Chen <johnchen@chromium.org>
Commit-Queue: John Chen <johnchen@chromium.org>
Cr-Commit-Position: refs/heads/master@{#717272}

tools/perf/expectations.config

@@ -325,6 +325,9 @@ crbug.com/979786 [ android-nexus-5x android-webview ] system_health.common_mobil
 crbug.com/1002640 [ android-pixel-2 ] system_health.common_mobile/browse:chrome:newtab [ Skip ]
 crbug.com/1002665 [ android-pixel-2 ] system_health.common_mobile/browse:chrome:omnibox [ Skip ]
 crbug.com/1014655 [ android-webview ] system_health.common_mobile/browse:social:instagram:2019 [ Skip ]
+crbug.com/1026822 [ android-go android-webview ] system_health.common_mobile/browse:media:youtube:2019 [ Skip ]
+crbug.com/1026822 [ android-go android-webview ] system_health.common_mobile/browse:news:nytimes:2019 [ Skip ]
+crbug.com/1026822 [ android-go android-webview ] system_health.common_mobile/browse:news:cnn:2018 [ Skip ]
 
 # Benchmark: system_health.memory_desktop
 crbug.com/984599 [ linux ] system_health.memory_desktop/long_running:tools:gmail-foreground [ Skip ]