Reorganize Android's test scripts into packages.

build/android/pylib/host_driven/run_python_tests.py

Index: build/android/pylib/host_driven/run_python_tests.py
diff --git a/build/android/pylib/run_python_tests.py b/build/android/pylib/host_driven/run_python_tests.py
similarity index 95%
rename from build/android/pylib/run_python_tests.py
rename to build/android/pylib/host_driven/run_python_tests.py
index 7d39f482958003aa30571783eee7a39e0107c820..fcf21d0e742a00a6cd3f589a8b6722eca07ca363 100644
--- a/build/android/pylib/run_python_tests.py
+++ b/build/android/pylib/host_driven/run_python_tests.py
@@ -9,16 +9,17 @@ import os
 import sys
 import types
 
-import android_commands
-import apk_info
-import constants
+from pylib import android_commands
+from pylib import constants
+from pylib.instrumentation import apk_info
+from pylib.instrumentation import run_java_tests
+from pylib.instrumentation.run_java_tests import FatalTestException
+from pylib.test_result import TestResults
+
 import python_test_base
 from python_test_caller import CallPythonTest
 from python_test_sharder import PythonTestSharder
-import run_java_tests
-from run_java_tests import FatalTestException
 from test_info_collection import TestInfoCollection
-from test_result import TestResults
 
 
 def _GetPythonFiles(root, files):