Bug 1432848 - Use /usr/local/bin/linux64-minidump_stackwalk in Android tests; r=jmaher

It is included in the docker image, so there is no need to download it every time.

testing/mozharness/configs/android/android_common.py

@@ -22,7 +22,7 @@ config = {
     "tooltool_servers": ['http://relengapi/tooltool/'],
     "hostutils_manifest_path": "testing/config/tooltool-manifests/linux64/hostutils.manifest",
     "avds_dir": "/builds/worker/workspace/build/.android",
-    "download_minidump_stackwalk": True,
+    "minidump_stackwalk_path": "/usr/local/bin/linux64-minidump_stackwalk",
     "default_blob_upload_servers": ["https://blobupload.elasticbeanstalk.com"],
     "blob_uploader_auth_file": os.path.join(os.getcwd(), "oauth.txt"),
 

testing/mozharness/scripts/android_emulator_unittest.py

@@ -90,7 +90,6 @@ class AndroidEmulatorTest(BlobUploadMixin, TestingMixin, EmulatorMixin, BaseScri
         self.test_packages_url = c.get('test_packages_url')
         self.test_manifest = c.get('test_manifest')
         self.robocop_path = os.path.join(abs_dirs['abs_work_dir'], "robocop.apk")
-        self.minidump_stackwalk_path = c.get("minidump_stackwalk_path")
         self.emulator = c.get('emulator')
         self.test_suite = c.get('test_suite')
         self.this_chunk = c.get('this_chunk')
@@ -767,6 +766,7 @@ class AndroidEmulatorTest(BlobUploadMixin, TestingMixin, EmulatorMixin, BaseScri
 
         verify_args = []
         suites = self._query_suites()
+        minidump = self.query_minidump_stackwalk()
         for (verify_suite, suite) in suites:
             self.test_suite = suite
 
@@ -777,8 +777,8 @@ class AndroidEmulatorTest(BlobUploadMixin, TestingMixin, EmulatorMixin, BaseScri
             except:
                 self.fatal("Don't know how to run --test-suite '%s'!" % self.test_suite)
             env = self.query_env()
-            if self.query_minidump_stackwalk():
-                env['MINIDUMP_STACKWALK'] = self.minidump_stackwalk_path
+            if minidump:
+                env['MINIDUMP_STACKWALK'] = minidump
             env['MOZ_UPLOAD_DIR'] = self.query_abs_dirs()['abs_blob_upload_dir']
             env['MINIDUMP_SAVE_PATH'] = self.query_abs_dirs()['abs_blob_upload_dir']
             env['RUST_BACKTRACE'] = 'full'