[Android]Replace crunched image with source code image.

The resources in original xwalk_core_library are not valid 9-patch resource
and can't be used for Android studio/Maven. Have to use the resource in the
Chromium source.

BUG=
[Android] Use ant and xwalk_core_library for make_apk

Previously, we are copying the python script from gyp
and reproduce the steps gyp generated to build
xwalk_app_template_apk to make apk.

It's hard to maintain and now xwalk_core_library is
mature enough to be used as Android Library Project.

This commit uses ant and xwalk_core_library to make
apk to replace previous approach.

The changes including:
1. The app packaging tool structure:
 a. Assets, jars and template code are now put in
    "template", jars includes xwalk_runtime_java
    and xwalk_app_runtime_java.
 b. xwalk_core_library will be put in root folder of
    packaging tool.
 c. Scripts used by gyp generated commands are removed.
2. When make apk:
 a. Embedded Mode:
  1) Copy template to app folder named according to
     input app name.
  2) Copy xwalk_core_library into app folder.
  3) Move arch folders under "app/xwalk_core_library/libs/"
     to "app/native_libs/<arch>"
  4) For each target arch:
   4.1) Run "android update lib-project" for app/xwalk_core_library.
   4.2) Run "android update project" for app.
   4.3) Remove all subfolder in "app/xwalk_core_library/libs",
        to make sure it will only contains one arch folder after 4.4).
   4.4) Move back the needed native library for target arch back.
        it's actually partly reverting step 3).
   4.5) Run "ant release" in app.
   4.6) Copy and rename the built apk out to root folder of
        packaging tool.
 b. Shared Mode:
   1) Copy template to app folder named according to
      input app name.
   2) Remove xwalk_runtime_java.jar in "app/libs".
   3) Run "android update project" for app
   5) Run "ant release" in app.
   6) Copy and rename the built apk out to root folder of packaging
      tool.

BUG=https://crosswalk-project.org/jira/browse/XWALK-2128
[Android] Passwords of keystore as argument should not be mandatory

When make apk, if user wants to use their own keystore, they must
provide the password as command line argument for now.
Developers may have security concern for this.

This commit allows developers to input password while making apk.

BUG=https://crosswalk-project.org/jira/browse/XWALK-2138
[Tizen][Runtime] Check the package type using application id instead.

Crosswalk runtime will check an installed web application type according to the
configure file name, if there's config.xml, it represents a WGT package, and
manifest.json represents an XPK package. But if a package have both of them,
it's always identified as XPK package, no matter it's actually a WGT or XPK
package. The patch will change to check the package type using the application
id, the tizen style app id represents a WGT package, xpk style id will be
identified as XPK package.

BUG=XWALK-2220
[Android] Add target to generate AAR library

use command "ninja -C out/Release xwalk_core_library_aar" can generate AAR library,
the construct of this library is Root/jni/so Root/res Root/classes.jar Root/R.txt
Root/AndroidManifest.xml
the AAR library test successfully by gradle with different architecture.

BUG=XWALK-1930
Merge pull request #2270 from fujunwei/aar-library

[Android] Add target to generate AAR library
Merge pull request #2229 from wang16/ant_make_apk

[Android] Use ant and xwalk_core_library for make_apk
[Android] Copy Contacts and Messaging API to make runnable on xwalk_core_library

Copy right contacts_api.js and messaging_api.js while generating xwalk_core_library.

BUG=XWALK-2156
[Tools] Remove packaging/.

These scripts for creating Crosswalk installers were never used for
anything, contain unlicensed files are just dead weight.
Merge pull request #2288 from rakuco/remove-packaging-tools

[Tools] Remove packaging/.
Merge pull request #2268 from fujunwei/origin-master

[Android] Replace crunched image with source code image
Merge pull request #2285 from legendlee1314/debug

[Android] Copy Contacts and Messaging API to make runnable on xwalk_core_library
Merge pull request #2280 from takethathe/check_package_type

[Tizen][Runtime] Check the package type using application id instead.
Bump version to 8.37.189.0
[Android] Fix make_apk fails to make arm packages

It's because in libs folder, arm folder is name
"armeabi-v7a" instead of "arm".
Fix by using a dictionary to convert cpu arch name to
cpu arch folder name.

BUG=https://crosswalk-project.org/jira/browse/XWALK-2272
Merge pull request #2289 from wang16/make_apk_arm

[Android] Fix make_apk fails to make arm packages
[Tizen] Add signature xsd file into crosswalk

Because crosswalk has replaced WRT in Tizen common image, some metadata
file which provided by wrt-installer package are missed.
signature_schema.xsd is used to verify whether signature.xml is valid.
[Tizen] Checking widget signature

Process signatue file in widget according to
http://www.w3.org/TR/widgets-digsig/#signature-verification. Because
there is no Tizen CA root in image, reference validation and signature
validation on signature will be added when CA is ready.