Installd: Swap file for dex2oat

Add swap file support for dex2oat to installd. Only use in low-memory
mode.

Bug: 18596910

(cherry picked from commit f68ce4de7fcfcc090af7985972b304eed7dbaf63)

Change-Id: I131448f3907115054a592af73db86d2b9257ea33
1 file changed