Improve Springboard icon selection algorithm
Improve Springboard icon selection algorithm

Summary:
Also fixes https://github.com/facebook/WebDriverAgent/issues/553
Closes https://github.com/facebook/WebDriverAgent/pull/569

Differential Revision: D5155122

Pulled By: marekcirkos

fbshipit-source-id: 4a3c0587823a5f4db9a2edf20ed7b7a801197013

ymin/WebDriverAgent,ymin/WebDriverAgent,ymin/WebDriverAgent,ymin/WebDriverAgent