As promised, add a unit test that makes sure the in app payments app gets installed and is enabled.

BUG=313797
R=asargent@chromium.org

Review URL: https://codereview.chromium.org/65303003

git-svn-id: http://src.chromium.org/svn/trunk/src/build@235206 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

android/pylib/gtest/filter/unit_tests_disabled

@@ -61,6 +61,7 @@ ExtensionServiceTestSimple.*
 ExtensionSourcePriorityTest.*
 ExtensionSpecialStoragePolicyTest.*
 ExternalPolicyProviderTest.*
+ExternalProviderImplTest.*
 MenuManagerTest.*
 PageActionControllerTest.*
 PermissionsUpdaterTest.*