[Linaro-validation] Wait for homescreen for lava-test-shell

Hi,

Most of the Android tests related to GUI expect Android to have booted to homescreen. With the new lava-test-shell it appears that the tests begin to execute as soon as we reach to a shell prompt, this was not the case with lava-android-test where dispatcher waited till homescreen is reached.

I have sent a patch to Senthil to add a test to wait till homescreen is reached, but not all test repositories will include this test.

Is it possible to add wait for homescreen as a prerequisite in the lava-test-shell framework while running on android ?

Regards, Vishal