Update language to comply with Android's inclusive language guidance

More details in: https://source.android.com/setup/contribute/respectful-code

Bug: 161896447
Test: build, run unittests
Change-Id: I35732333da0dd0c871f3e37c4af1b2211647d1e3
diff --git a/tools/releasetools/test_check_target_files_vintf.py b/tools/releasetools/test_check_target_files_vintf.py
index d326229..8725dd6 100644
--- a/tools/releasetools/test_check_target_files_vintf.py
+++ b/tools/releasetools/test_check_target_files_vintf.py
@@ -87,8 +87,8 @@
     return test_dir
 
   @test_utils.SkipIfExternalToolsUnavailable()
-  def test_CheckVintf_sanity(self):
-    msg = 'Sanity check with skeleton target files failed.'
+  def test_CheckVintf_skeleton(self):
+    msg = 'vintf check with skeleton target files failed.'
     test_dir = self.prepare_test_dir('does-not-exist')
     self.assertTrue(CheckVintf(test_dir), msg=msg)