Change adb_mock sleep time to 10

Killing processes when they're sleeping is hard. We don't actually need
the mock to live this long.

Author: alpiccioni

tests/mocks/adb_mock.sh

@@ -7,5 +7,5 @@ elif grep -q "wait-for-device" <<<$@; then
 	sleep 0.01
 elif grep -q "logcat" <<<$@; then
 	echo $mocked_adb_output
-	sleep 9999999
+	sleep 10
 fi