Reorganize Android's test scripts into packages.

build/android/pylib/gtest/test_package_apk.py

Index: build/android/pylib/gtest/test_package_apk.py
diff --git a/build/android/pylib/test_package_apk.py b/build/android/pylib/gtest/test_package_apk.py
similarity index 97%
rename from build/android/pylib/test_package_apk.py
rename to build/android/pylib/gtest/test_package_apk.py
index e43ef751fb1d068a245f351ac92cce2c6622a551..9214a2fd2920265977e6d4fdd5fc5133ca1be296 100644
--- a/build/android/pylib/test_package_apk.py
+++ b/build/android/pylib/gtest/test_package_apk.py
@@ -9,11 +9,13 @@ import sys
 import tempfile
 import time
 
-import android_commands
-import constants
-from android_commands import errors
-from test_package import TestPackage
+from pylib import android_commands
+from pylib import constants
 from pylib import pexpect
+from pylib.android_commands import errors
+
+from test_package import TestPackage
+
 
 class TestPackageApk(TestPackage):
   """A helper class for running APK-based native tests.