[misc][XWALK-2231] Integrate MediaSource API Demo

- https://github.com/ebidel/html5demos/blob/master/html5-demos.appspot.com/static/media-source.html
  under the Apache License, Version 2.0
- Bug  https://crosswalk-project.org/jira/browse/XWALK-2231
- Task https://crosswalk-project.org/jira/browse/XWALK-2331
[misc] Comment out google fonts and analytics dependency
[embedding][XWALK-2381] Change loadAppFromManifest mode to sync and improve pack.sh and loadUrl

Impacted tests(approved): new 0, update 1, delete 0
Unit test platform: [Android]
Unit test result summary: pass 84, fail 18, block 4
[sample] Remove tinyweb impact test and fix style issue

 Impacted TCs num: New 0, Update 5, Delete: 2
 Unit test Platform: Android
 Unit test result: all tests run well
[usecase-webapi] Remove two unused subcase tags for usecase

Impacted TCs num(approved): New 0, Update 2, Delete 0
Unit test Platform: [Andriod]
Unit test result summary: Pass 2, Fail 0, Blocked 0
[wrt][xwalk-2412] Update case description

Impacted TCs num(approved): New 0, Update 1, Delete 0
Unit test Platform: Android
Android test result summary: Pass 1, Fail 0, Block 0
[wrt][xwalk-1507/1508/1509/1510] Move 4 TCs from tizen2.3/wrt

- Those TCs feature has not been resolved

Impacted TCs num(designed): New 4, Update 0, Delete 0
[behavior][wrt]mapping legacy tcs

[Detailed commit message (if have)]
Impacted TCs num(approved): New 2, update 0, deleted 0
Unit test platform: [tizen]
Unit test result summary: Pass 2, Fail 0, Blocked 0
Merge pull request #807 from JianfengXu/xujf/usecase/subcase

[usecase-webapi] Remove two unused subcase tags for usecase
Merge pull request #771 from zhuyongyong/yongzhu/embeddingAPI-tests/loadUrl

[embedding][XWALK-2381] Change loadAppFromManifest mode to sync and improve pack.sh
[sample] Replace upstream resources with self created

 Impacted TCs num: New 0, Update 2, Delete 0
 Unit test Platform: Android
 Unit test result: Pass 2, Fail 0, Block 0
adjust the tag order to the same with others
[webapi] Update 3 TCs for iap

- Update 3 TCs for iap
- Failure analysis: "In App Purchase" feature is not allowed in China

Impacted tests(approved): new 0, update 3, delete 0
Unit test platform: [Android]
Unit test result summary: pass 0, fail 3, block 0
Merge pull request #798 from Honry/Honry/sample-remove-tinyweb

[sample] Remove tinyweb impact test and fix style issue
 Rename pic name to keep consistency
Merge pull request #815 from Honry/Honry/sample-replace-upstream-resources

[sample] Replace upstream resources with self created
Merge pull request #808 from wanghongjuan/wanghongjuan/wrt/xwalk-2412

[wrt][xwalk-2412] Update case description
Merge pull request #809 from wanghongjuan/wanghongjuan/wrt/tizen-legacy

[wrt][xwalk-1507/1508/1509/1510] Move 4 TCs from tizen2.3/wrt
Merge pull request #812 from linshen/wrt/shen/gerrit-github

[behavior][wrt][XWALK-1492]mapping legacy tcs
[sample] Remove XML styles

- These style files are not must for the samples, and
  they are from testkit-lite repo under GPL 2.0 License