Make Telemetry report VM peak metric on Android.

tools/telemetry/telemetry/core/platform/android_platform_backend.py

Index: tools/telemetry/telemetry/core/platform/android_platform_backend.py
diff --git a/tools/telemetry/telemetry/core/platform/android_platform_backend.py b/tools/telemetry/telemetry/core/platform/android_platform_backend.py
index 6cc897593477570acbec7d7548f4727067ddfd2b..f2b83b5e4fa32c8bb616614d3e378f82c227987a 100644
--- a/tools/telemetry/telemetry/core/platform/android_platform_backend.py
+++ b/tools/telemetry/telemetry/core/platform/android_platform_backend.py
@@ -104,7 +104,8 @@ class AndroidPlatformBackend(platform_backend.PlatformBackend):
     memory_usage = self._adb.GetMemoryUsageForPid(pid)[0]
     return {'ProportionalSetSize': memory_usage['Pss'] * 1024,
             'SharedDirty': memory_usage['Shared_Dirty'] * 1024,
-            'PrivateDirty': memory_usage['Private_Dirty'] * 1024}
+            'PrivateDirty': memory_usage['Private_Dirty'] * 1024,
+            'VMPeak': memory_usage['VmHWM'] * 1024}
 
   def GetIOStats(self, pid):
     return {}