Cache the staged session id to skip a staging again

On restarting install after the user grants install permission to
unknown app, we need to skip staging the original file once again. As
such, pass the stagedsessionId while restarting the activity so that
staging can be skipped.

Bug: 182205982
Test: builds successfully
Test: No CTS Tests. Flag to use new app is turned off by default

Change-Id: Iee72576d535613e39e132ffd9e1a1a452838fb82