add xml report

- add getDeviceInfo command to get information from client
- rename ModelBuilderTest test case xml (all.xml gone)
- reduce buffer size for AudioTrack if data size is small
- add -s option
- generate XML report similar to CtsVerifier and zip the result.

Change-Id: Ic28e0234cfdb848ba1a2f91cc57f15bfdefafd87
19 files changed