[Android] Fix the bug when full path to test apk is provided.

build/android/pylib/test_options_parser.py

Index: build/android/pylib/test_options_parser.py
diff --git a/build/android/pylib/test_options_parser.py b/build/android/pylib/test_options_parser.py
index 65399aadf9b8f6004f5ecb4eb3fb30283ff8662e..93382645c366a44d1de9cd82f0fef693f5933e60 100644
--- a/build/android/pylib/test_options_parser.py
+++ b/build/android/pylib/test_options_parser.py
@@ -167,7 +167,8 @@ def ValidateInstrumentationOptions(option_parser, options, args):
   if os.path.exists(options.test_apk):
     # The APK is fully qualified, assume the JAR lives along side.
     options.test_apk_path = options.test_apk
-    options.test_apk_jar_path = os.path.splitext(options.test_apk_path) + '.jar'
+    options.test_apk_jar_path = (os.path.splitext(options.test_apk_path)[0] +
+                                 '.jar')
   else:
     options.test_apk_path = os.path.join(_SDK_OUT_DIR,
                                          options.build_type,