[Android] Fix the issue about file picker does not work.

This patch is to fix the issue about file picker does not work.
Upstream has added content URI to upload photos taken by camera,
so we follow it.

BUG=XWALK-2631
As the implementation in SelectFileDialog.java as follows:
```
camera.setClipData(
            ClipData.newUri(context.getContentResolver(), IMAGE_FILE_PATH, mCameraOutputUri));
```
App client should supply a content provider to check permission. 
We can insert the related code about content provider to "AndroidManifest.xml" in customize.py.