[tools/perf] Disably flaky stories on internal bots

Stories currently flaky on internal perf bots.

TBR=negnguyen@google.com
NOTRY=true

Bug: 883652
Change-Id: Ifd976bfa0e2ef64490129f75d3d5c2ccb0f40e2d
Reviewed-on: https://chromium-review.googlesource.com/1226594Reviewed-by: Juan Antonio Navarro Pérez <perezju@chromium.org>
Commit-Queue: Juan Antonio Navarro Pérez <perezju@chromium.org>
Cr-Commit-Position: refs/heads/master@{#591344}

tools/perf/expectations.config

@@ -262,6 +262,11 @@ crbug.com/883320 [ Android_Go ] system_health.memory_mobile/browse:news:cnn [ Sk
 crbug.com/883320 [ Android_Go ] system_health.memory_mobile/browse:news:cnn:2018 [ Skip ]
 crbug.com/883320 [ Android_Go ] system_health.memory_mobile/browse:social:tumblr_infinite_scroll [ Skip ]
 crbug.com/880652 [ Nexus_5X ] system_health.memory_mobile/browse:shopping:avito [ Skip ]
+crbug.com/883652 [ Android_One ] system_health.memory_mobile/browse:social:tumblr_infinite_scroll [ Skip ]
+crbug.com/883652 [ Android_One ] system_health.memory_mobile/browse:news:cnn:2018 [ Skip ]
+crbug.com/883652 [ Android_One ] system_health.memory_mobile/browse:news:cnn [ Skip ]
+crbug.com/883652 [ Android_One ] system_health.memory_mobile/browse:news:toi [ Skip ]
+crbug.com/883652 [ Nexus_5 ] system_health.memory_mobile/browse:shopping:avito [ Skip ]
 
 # Benchmark: start_with_url.warm.startup_pages
 crbug.com/878175 [ Android ] start_with_url.warm.startup_pages/about:blank [ Skip ]