Revert "[infra] Blacklist android device id in attempt to make buildbot builder more stable"

This reverts commit 8044e32fc5e89a37cff0b8d3009a279b42dc147c.

Reason for revert: The device was fixed, and there is now one device per bot. Blacklisting a single device is no longer the right approach because it effectively destroys a bot.

Original change's description:
> [infra] Blacklist android device id in attempt to make buildbot builder more stable
> 
> This particular device sometimes fails with errors such as:
> 
>   * "protocol error"
>   * "protocol error (no status)"
>   * "device not found"
> 
> Change-Id: Iced97ae8f5e891c43436a3d745004517dc59b42c
> Reviewed-on: https://dart-review.googlesource.com/c/84905
> Reviewed-by: Alexander Thomas <athom@google.com>
> Reviewed-by: Vyacheslav Egorov <vegorov@google.com>
> Commit-Queue: Martin Kustermann <kustermann@google.com>

TBR=whesse@google.com,vegorov@google.com,kustermann@google.com,athom@google.com

# Not skipping CQ checks because original CL landed > 1 day ago.

Change-Id: I8422a75d10518ec06de737a0a719f9648279fbf8
Reviewed-on: https://dart-review.googlesource.com/c/89500
Reviewed-by: Alexander Thomas <athom@google.com>
Commit-Queue: Alexander Thomas <athom@google.com>
diff --git a/tools/testing/dart/android.dart b/tools/testing/dart/android.dart
index 5cb232a..20e5fca 100644
--- a/tools/testing/dart/android.dart
+++ b/tools/testing/dart/android.dart
@@ -393,9 +393,6 @@
  * Helper to list all adb devices available.
  */
 class AdbHelper {
-  // This particular device seems to be flakily going offline / having problems.
-  static const blackListedDeviceIds = const <String>['06ada00c003b6f92'];
-
   static RegExp _deviceLineRegexp =
       new RegExp(r'^([a-zA-Z0-9_-]+)[ \t]+device$', multiLine: true);
 
@@ -408,7 +405,6 @@
       return _deviceLineRegexp
           .allMatches(result.stdout as String)
           .map((Match m) => m.group(1))
-          .where((String deviceId) => !blackListedDeviceIds.contains(deviceId))
           .toList();
     });
   }