[android] Do not rm test dependencies when doing a full directory push in PushIfNeeded.

build/android/pylib/android_commands.py

Index: build/android/pylib/android_commands.py
diff --git a/build/android/pylib/android_commands.py b/build/android/pylib/android_commands.py
index 28cf4bb7e2185405b686c17c63cdbff9217fc4fb..9f5c2dfbe86dc3fc88eb2d0ccdb35a8f7dfa8cbd 100644
--- a/build/android/pylib/android_commands.py
+++ b/build/android/pylib/android_commands.py
@@ -899,10 +899,8 @@ class AndroidCommands(object):
     # TODO(craigdh): Replace this educated guess with a heuristic that
     # approximates the push time for each method.
     if len(changed_files) > MAX_INDIVIDUAL_PUSHES or diff_size > 0.5 * size:
-      # We're pushing everything, remove everything first and then create it.
       self._actual_push_size += size
       if os.path.isdir(host_path):
-        self.RunShellCommand('rm -r %s' % device_path, timeout_time=2 * 60)
         self.RunShellCommand('mkdir -p %s' % device_path)
       Push(host_path, device_path)
     else: