Implement an adb-based driver for the ChromiumAndroidPort

Implement an adb-based driver for the ChromiumAndroidPort
https://bugs.webkit.org/show_bug.cgi?id=78627

Reviewed by Eric Seidel.

This driver mostly just wires up the ChromiumDriver through adb.  In
some cases, it translates protocol elements, such as URIs, so that the
rest of webkitpy is insulated from the "remoteness" of the target device.

* Scripts/webkitpy/layout_tests/port/chromium_android.py:
(ChromiumAndroidPort.start_helper):
(ChromiumAndroidPort._driver_class):
(ChromiumAndroidPort._update_version):
(ChromiumAndroidPort._get_stderr):
(ChromiumAndroidPort):
(ChromiumAndroidPort._get_last_stacktrace):
(ChromiumAndroidPort._teardown_performance):
(ChromiumAndroidDriver):
(ChromiumAndroidDriver.__init__):
(ChromiumAndroidDriver._start):
(ChromiumAndroidDriver.run_test):
(ChromiumAndroidDriver.stop):
(ChromiumAndroidDriver._test_shell_command):
(ChromiumAndroidDriver._write_command_and_read_line):
(ChromiumAndroidDriver._output_image):
(ChromiumAndroidDriver._has_crash_hint):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@107756 268f45cc-cd09-0410-ab3c-d52691b4dbfc