Change the location of current profiles for secondary dex files

Move the secondary dex profiles inside the oat folder. This makes it
easier to clean them up and "protects" them against apps which may delete
unknown files from their directories (e.g. search).

Bug: 62336157
Test: Manual: boot the device, use the app, check the profiles are
collected in the new location.

Change-Id: I2fbce7591589d162775e4652b12e4698083adcff