Fix boot classes init when compiling app image

Classes resident in boot library should not be initialized and stored in
app image anyway while compiling app image.

Fixed by checking the location of classes in compiler driver when
initializing classes and is compiling app image.

The InitializeDependencies is advanced which makes TryInitialize become
the only entrypoint for app image, and since boot image doesn't need
this function, the behavior for compiling boot image should stay the
same.

Bug: 62715577
Test: not covered now, will be fixed and test by another CL.
Change-Id: I8e683e6b14f1402dba8ef5c4b0f5fa936a343d8c