Bug 1436262 - Improve efficiency of detection of end of test Android test runs; r=jmaher

Once a test summary is seen, check for application completion more often,
so that we can complete the test run sooner.

build/mobile/remoteautomation.py

@@ -415,6 +415,8 @@ class RemoteAutomation(Automation):
                         slowLog = True
                     if hasOutput:
                         noOutputTimer = 0
+                    if self.counts and 'pass' in self.counts and self.counts['pass'] > 0:
+                        interval = 0.5
                 time.sleep(interval)
                 timer += interval
                 noOutputTimer += interval