Bug 1752362 - Add mach adb to use bootstrap version of adb r=geckoview-reviewers,m_kato

This is a very simple shim to get access the same adb that is installed by mach
bootstrap without needing to muck with environment variables. This is useful for
basic troubleshooting (`adb kill-server`, `adb devices`, etc).

Differential Revision: https://phabricator.services.mozilla.com/D235662

Author: moztcampbell

mobile/android/mach_commands.py

@@ -755,3 +755,32 @@ def emulator(
                 "Unable to retrieve Android emulator return code.",
             )
     return 0
+
+
+@Command(
+    "adb",
+    category="devenv",
+    description="Run the version of Android Debug Bridge (adb) utility that the build system would use.",
+)
+@CommandArgument("args", nargs=argparse.REMAINDER)
+def adb(
+    command_context,
+    args,
+):
+    """Run the version of Android Debug Bridge (adb) utility that the build
+    system would use."""
+    from mozrunner.devices.android_device import get_adb_path
+
+    adb_path = get_adb_path(command_context)
+    if not adb_path:
+        command_context.log(
+            logging.ERROR,
+            "adb",
+            {},
+            "ADB not found. Did you run `mach bootstrap` with Android selected yet?",
+        )
+        return 1
+
+    return command_context.run_process(
+        [adb_path] + args, pass_thru=True, ensure_exit_code=False
+    )

python/mach/mach/command_util.py

@@ -48,6 +48,7 @@ def __init__(
 
 
 MACH_COMMANDS = {
+    "adb": MachCommandReference("mobile/android/mach_commands.py"),
     "addstory": MachCommandReference("toolkit/content/widgets/mach_commands.py"),
     "addtest": MachCommandReference("testing/mach_commands.py"),
     "addwidget": MachCommandReference("toolkit/content/widgets/mach_commands.py"),