Match more leniant sceenshot comparison of existing tests

Workaround 0.1% pixel discrepency while graphical issue for text in
action bar is being investigated. Existing Preference CTS already use 0.99 precision.

Bug: 227553681
Test: atest CtsPreferenceTestCases:android.preference.cts.PreferenceActivityLegacyFlowTest#legacyActivityRecreateTest

Change-Id: I1fe19fb43ce67c30dc5f141b594b040b39154c28
(cherry picked from commit 4395dcc92d8bd1c2d633f21640acb873123be688)
1 file changed