Bug 1532695 - Include target.gtest.tests.tar.gz in android builds; r=bc

Differential Revision: https://phabricator.services.mozilla.com/D26587

--HG--
extra : moz-landing-system : lando

moz.configure

@@ -320,14 +320,14 @@ option('--disable-gtest-in-build',
        when='--enable-compile-environment')
 
 # Determine whether to build the gtest xul. This happens in automation
-# on Desktop platforms with the exception of Windows PGO, where linking
-# xul-gtest.dll takes too long.
+# on Android and Desktop platforms with the exception of Windows PGO, where
+# linking xul-gtest.dll takes too long.
 @depends('MOZ_PGO', build_project, target, 'MOZ_AUTOMATION', '--disable-gtest-in-build',
          enable_tests, when='--enable-compile-environment')
 def build_gtest(pgo, build_project, target, automation, enabled, enable_tests):
     if not enable_tests or not enabled:
         return None
-    if (automation and build_project == 'browser' and
+    if (automation and build_project in ('browser', 'mobile/android') and
         not (pgo and target.os == 'WINNT')):
         return True