Revert "Make AndroidRuntime only start the debugger for zygote forked apps."

This reverts commit daf17d415c1a99c515ffa75f3ec3bb0fb87627fe.

Reason for revert: Topic broke go/art-build. Reverting as ART Sheriff. 

Change-Id: I913dcb82532d448116b0c60d98a91b9b7442d5c9
1 file changed