Disable the load:tools:dropbox:2019 system_health story on Android Go

TBR=sullivan
NOTRY=true

Bug: 1113921
Change-Id: I4d19e804cdcd040f3b35be151ccd0c91c6b52c42
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2340875Reviewed-by: oysteine <oysteine@chromium.org>
Commit-Queue: oysteine <oysteine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#795696}

tools/perf/expectations.config

@@ -307,6 +307,7 @@ crbug.com/1044956 [ android-pixel-2 ] system_health.common_mobile/background:too
 crbug.com/1098223 [ android-go android-webview ] system_health.common_mobile/load:tools:dropbox:2019 [ Skip ]
 crbug.com/1098225 [ android-go android-webview ] system_health.common_mobile/browse:news:globo:2019 [ Skip ]
 crbug.com/1112337 [ android ] system_health.common_mobile/browse:news:cricbuzz:2019 [ Skip ]
+crbug.com/1113921 [ android-go ] system_health.common_mobile/load:tools:dropbox:2019 [ Skip ]
 
 # Benchmark: system_health.memory_desktop
 crbug.com/984599 [ linux ] system_health.memory_desktop/long_running:tools:gmail-foreground [ Skip ]
@@ -366,6 +367,7 @@ crbug.com/1044956 [ android-pixel-2 ] system_health.memory_mobile/background:too
 crbug.com/1049984 [ android-go android-webview ] system_health.memory_mobile/browse:social:instagram:2019 [ Skip ]
 crbug.com/1097719 [ android-nexus-5x android-webview ] system_health.memory_mobile/browse:social:instagram:2019 [ Skip ]
 crbug.com/1112337 [ android ] system_health.memory_mobile/browse:news:cricbuzz:2019 [ Skip ]
+crbug.com/1113921 [ android-go ] system_health.memory_mobile/load:tools:dropbox:2019 [ Skip ]
 
 # Benchmark: tab_switching.typical_25
 crbug.com/747026 [ mac ] tab_switching.typical_25/multitab:misc:typical24 [ Skip ]