Avoid crashing when downloading MitM'd PAC that is too big am: 7d2198b586 am: 9c1cb7a273 am: 6634e90ad7 am: 66ee2296a9 am: d37eb76465
am: ddce8664bd

Change-Id: I9379db3398f066841fdb5435d8128e2d12bff63b