[Android] Move the remaining tests to internal shell test

Move HandleActionUriTest.java, SetDatabaseEnabledTest.java,
SetDomStorageEnabledTest.java, SetNetworkAvailableTest.java, UserAgentTest.java
from core shell test to core internal shell test.
[Android] Remove the unnecessary code in ShouldInterceptLoadRequestTest.java

As the javascript are enabled by default,
no need to set it to enable explicitly.
[Android] Remove the internal dependency in XWalkViewTestBase.java

As all internal dependency test is moved into internal test,
this code is unnecessary now, just remove it.
[Tizen] gbs-build crosswalk8 rpm fail

Exclude unnecessary directory android_tools when build for tizen.

BUG=XWALK-2224
Merge pull request #2272 from iKevinHan/xwalk-2224

[Tizen] gbs-build crosswalk8 rpm fail.
Bump version to 8.37.187.0
Merge pull request #2260 from jinbang/move_test_to_internal2

[Android] Move the remaining tests to internal shell test
[Android] Implement the interface for onScaleChanged.

This patch is to add the bridge code for onScaleChanged.
In xwalk_render_view_host_ext.cc, it receives the event about page
scale factor changed, transfers the factor to XWalkContentsClientBridge.