Bug 1882087 - Format ui-test failure messages for treeherder. r=aaronmt,tthibaud,android-reviewers,aryx

Example: https://treeherder.mozilla.org/logviewer?job_id=450541238&repo=try
```
TEST-UNEXPECTED-FAIL | failure | https://console.firebase.google.com/project/moz-fenix/testlab/histories/bh.66b7091e15d53d45/matrices/8658376039685060316 | 1 test cases failed, 589 passed
```
That's an unconventional and suboptimal error message, but it's the only information that I see readily available; hopefully someone can improve on this in the future.

Differential Revision: https://phabricator.services.mozilla.com/D204207

Author: gbrownmozilla

mobile/android/android-components/automation/taskcluster/androidTest/parse-ui-test.py

@@ -62,6 +62,12 @@ def main():
                 **matrix_result
             )
         )
+        if matrix_result["outcome"] != "success":
+            # write failures to test log in format known to treeherder logviewer
+            sys.stdout.write(
+                f"TEST-UNEXPECTED-FAIL | {matrix_result['outcome']} | {matrix_result['webLink']} | {matrix_result['axes'][0]['details']}\n"
+            )
+
     print("---\n")
     print("# References & Documentation\n")
     print(

mobile/android/fenix/automation/taskcluster/androidTest/parse-ui-test.py

@@ -60,6 +60,11 @@ def main():
                 f"| {matrix_result['matrixId']} | {matrix_result['outcome']}"
                 f"| [Firebase Test Lab]({matrix_result['webLink']}) | {axis['details']}\n"
             )
+            if matrix_result["outcome"] != "success":
+                # write failures to test log in format known to treeherder logviewer
+                sys.stdout.write(
+                    f"TEST-UNEXPECTED-FAIL | {matrix_result['outcome']} | {matrix_result['webLink']} | {axis['details']}\n"
+                )
     print("---\n")
     print("# References & Documentation\n")
     print(

mobile/android/focus-android/automation/taskcluster/androidTest/parse-ui-test.py

@@ -60,6 +60,11 @@ def main():
                 f"| {matrix_result['matrixId']} | {matrix_result['outcome']}"
                 f"| [Firebase Test Lab]({matrix_result['webLink']}) | {axis['details']}\n"
             )
+            if matrix_result["outcome"] != "success":
+                # write failures to test log in format known to treeherder logviewer
+                sys.stdout.write(
+                    f"TEST-UNEXPECTED-FAIL | {matrix_result['outcome']} | {matrix_result['webLink']} | {axis['details']}\n"
+                )
     print("---\n")
     print("# References & Documentation\n")
     print(