Do GC for alloc for unstarted runtimes

Currently, concurrent GC requests are ignored for unstarted runtimes.
The new logic is to do a GC for alloc in RequestConcurrentGC if the
runtime is not started. This reduces the java heap size in dex2oat.

Change-Id: I8d4364a4e3537013b27390bb22a6f64aab58c924
1 file changed