Support Soong-generated module-info.json entries

Allow Soong modules to generate their own module-info.json entries
by merging Soong's module-info.json file into the one generated in
Make.

Skip collecting unnecessary ALL_MODULES.$(my_register_name).*
that are only used for module-info.json if the module was already
handled by Soong via the LOCAL_SOONG_MODULE_INFO_JSON property.

Bug: 309006256
Test: Compare module-info.json
Change-Id: I2c9db3c7c7bae7bd6cb889d7ebc2e383c278c82d