Define stubs_defaults for the new API surfaces

The new stubs_defaults shall be used to create stub libraries from
modules. The existing defaults
'framework-module-stubs-defaults-systemapi' is not enough because it
only captures the SystemApis with client=PRIVILEGED_APPS. Modules can
have broader SystemApis with client=MODULE_APPS and
client=MODULE_LIBRARIES.

Bug: b/140202860
Test: m
Change-Id: I5f425928cf1db912ebe09499111a9925fcfc98fb