Add new properties

Droiddoc_options is added, since all sdk libraries don't builds with the
same argument. We provide basic droiddoc argument and options can be
added like "stubsourceonly" by this property.

When building stubs, soong don't make dex files, but some module uses
dex files from stubs. So Complie_dex is added for compiling dex
regardless of installable.

Srcs_lib_whitelist_pkgs property is added for using other whitelist
pkgs instead of "android.annotation".

Bug: 77577799
Test: m -j
Change-Id: Ic2fb7bc9c49a825550dbebe3e9132ad9a735322f