Add UiAutomator test skeleton to CTS. (manual merge from jb-dev)

This change adds a new uiautomator test type to CTS. Includes makefile changes
to generate the package XML, as well as a skeleton test app and test.

Bug 7510316

Change-Id: I32472f737537ff7f5ebe08cd85121793b29a9680

Conflicts:

	tools/cts-java-scanner/src/com/android/cts/javascanner/DocletRunner.java
	tools/tradefed-host/src/com/android/cts/tradefed/testtype/TestPackageDef.java
20 files changed