Run pip transition 5x

The test was previously running the transition 20 times incorrectly. This frequently led to OOM errors, since the system would store 80 instances of protos + flicker objects in memory while making assertions.

Intead run the default 5x

Bug: 216303412
Test: atest ExitPipWithSwipeDownTest
Change-Id: I20fe19239a857cfbc0818910814041323735692a