[wrt] Update android auto scripts
[wrt]Update host prefix path

[Detailed commit message (if have)]
Impacted TCs num(designed): New 0, update 4, deleted 0
Unit test platform: [tizen]
UT result: pass: 4, Fail 0
Merge pull request #847 from linshen/shen/wrt/update-manifest

[wrt]Update host prefix path
Merge pull request #845 from kangxu/kangxu/wrt/pyauto/updateScript

[wrt] Update android auto scripts
[wrt] Remove wrt invaid cases and update usecase
Merge pull request #850 from kangxu/kangxu/wrt/wrtandroid/updateCases

[wrt] Remove wrt invaid cases and update usecase