Add support for dEQP test to tradefed.

Add new test type DeqpTest to Android CTS tradefed. This test type runs
dEQP tests through instrumentation and parses output events and reports
them to ITestRunListener.

Also supports collecting per test case dEQP logs by setting option
collect-deqp-logs to true.

Bug: 17388917
Change-Id: I67577b3faf625f3100e3e1c2cad0a4e410232ba7
Signed-off-by: Mika Isojärvi <misojarvi@google.com>