Disable flaky test testSymbolizedMinidump on Android

Per #2 from the linked bug, this could also be related to crbug.com/1138060.

TBR=bsheedy@chromium.org
Bug: 1149237

Change-Id: I753dfe6f364f93d9dd01314357cbb6ee8c67924d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2557906Reviewed-by: Yi Gu <yigu@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830585}

tools/perf/core/minidump_unittest.py

@@ -48,6 +48,7 @@ class BrowserMinidumpTest(tab_test_case.TabTestCase):
   # still read-only, so skip the test in that case.
   @decorators.Disabled(
       'chromeos-local',
+      'android', # https://crbug.com/1149237
       'win7'  # https://crbug.com/1084931
   )
   def testSymbolizeMinidump(self):