[Tizen/Desktop] Remove app un/installation functionality from xwalk

Remove app un/installation functionality from 'xwalk' binary.
The 'xwalkctl' should be used instead.
[Android][Manifest] Support 'orientation' member

Packaging tool support the 'orientation' member of the manifest:
http://w3c.github.io/manifest/#orientation-member

BUG=https://crosswalk-project.org/jira/browse/XWALK-2022
Merge pull request #2150 from jinbang/tool_support_manifest_orientation

[Android][Manifest] Support 'orientation' member
Fix the invalid product string of Crosswalk.

The product string value should align with the value in user agent, which
will also be used by the DevTools ('Browser' section of version command).

The product string is meanful for remote debugging, eg: if the version in
product string is higer than the version of desktop Chrome. Then the
'chrome://inspect' UI should report the following warning string:
"You may need a newer version of desktop Chrome. Please try Chrome 36.0.1985.18 or later."

This is useful information for remote debugging, to make it work with non-Chrome
browsers (include Crosswalk) in device, the upstream patch under review should also
be required:
   https://codereview.chromium.org/367083002/

BUG=
[Android] Miss macro of WebRTC related code

Now the WebRTC codes are under control of "enable_webrtc" flag and
"ENABLE_WEBRTC" macro.
Merge pull request #2154 from xingnan/webrtc-macro

[Android] Miss macro of WebRTC related code
Merge pull request #2153 from pozdnyakov/big_removal_patch

[Tizen/Desktop] Remove app un/installation functionality from xwalk
[Android] Refactor internal extension code.

Name of extension is unnessesary to be public, private is enough. Thus,
presentation, launch_screen prototype is changed as well.
[Android] Stop manually checking --mode's value in make_apk.

Just pass `choices' when adding the option instead.
Bump version to 8.36.165.0
Merge pull request #2162 from sqliu/fix-adb

Fix the invalid product string of Crosswalk.
Merge pull request #2160 from rakuco/remove-manual-check-for-mode-make_apk

[Android] Stop manually checking --mode's value in make_apk.
Merge pull request #2157 from halton/extension_refactor

[Android] Refactor internal extension code.
[Android] Support http://w3c.github.io/manifest/ for packaging tool

Support "start_url", "xwalk_launch_screen" and "xwalk_permissions" field in manifest.
The legacy field "launch_path", "app.launch.local_path", "launch_screen" and "permissions"
are still supported, but will print a warning message.
Merge pull request #2134 from jinbang/tool_support_w3c_manifest

[Android] Support http://w3c.github.io/manifest/ for packaging tool
[Tizen] This commit implements the splash screen for Tizen.
It read a splash screen image (static) from the wgt config file and show it on the center of the main window when the application is launched.
And after the content is loaded, hide the splash screen image in amincation way.

The wgt config has a setting node to define the basic configuration of the splash screen. And currently it contains the path of the image as below:
<splash-screen src="splash.png"/>

BUG=XWALK-1150