[Android] Fix the encode error for writing DBCS.

This patch is to fix the encode error for writing description with
DBCS and name is not defined error.
In python3, "unicode" is deprecated, the value should not be encoded.

BUG=BUG=XWALK-2382, XWALK-2398
Merge pull request #2352 from wuhengzhi/encode_error_description

[Android] Fix the encode error for writing DBCS.