components_unittests failing on chromium.android/Android N5X Swarm Builder

Builders failed on: 
- Android N5X Swarm Builder: 
  https://build.chromium.org/p/chromium.android/builders/Android%20N5X%20Swarm%20Builder


This test appears to be flaky, occasionaly reporting:

../../base/test/histogram_tester.cc:155: Failure
Value of: actual_count
  Actual: 1
Expected: expected_count
Which is: 2
Histogram "Single.Sample.Metric" does not have the right number of samples (2) in the expected bucket (7). It has (1).
../../base/test/histogram_tester.cc:170: Failure
Value of: actual_count
  Actual: 1
Expected: expected_count
Which is: 2
Histogram "Single.Sample.Metric" does not have the right total number of samples (2). It has (1).

Disabling this single test as flaky, but please look into whether the underlying cause is the test or the single-sample metrics code.

Flakes:
https://uberchromegw.corp.google.com/i/chromium.android/builders/Android%20N5X%20Swarm%20Builder/builds/12091
https://uberchromegw.corp.google.com/i/chromium.android/builders/Android%20N5X%20Swarm%20Builder/builds/12084