[Telemetry] Only install test certificate on android device version L and below

telemetry/telemetry/internal/platform/android_platform_backend.py

Index: telemetry/telemetry/internal/platform/android_platform_backend.py
diff --git a/telemetry/telemetry/internal/platform/android_platform_backend.py b/telemetry/telemetry/internal/platform/android_platform_backend.py
index 4f71c5de0359122925c853f7e5558d49abbcabf4..fe69564aef5b4bd8f5fea852a8209be88bba0ad2 100644
--- a/telemetry/telemetry/internal/platform/android_platform_backend.py
+++ b/telemetry/telemetry/internal/platform/android_platform_backend.py
@@ -529,7 +529,9 @@ class AndroidPlatformBackend(
 
   @property
   def supports_test_ca(self):
-    return True
+    # TODO(nednguyen): figure out how to install certificate on Android M
+    # crbug.com/593152
+    return self._device.build_version_sdk <= version_codes.LOLLIPOP
 
   def InstallTestCa(self, ca_cert_path):
     """Install a randomly generated root CA on the android device.