Remove unnecessary options when generating stubs from signatures

These options are unnecessary because:
* `--format` and `--api-overloaded-method-order` only affects the
  generation of signature files which this does not do.

Also changed the build rule description to differentiate from the
usual metalava command to make it easier to find in the ninja file.

Bug: 296115567
Test: m --build-from-text-stub
Change-Id: I7986cba00c364282ddc436d2e69bfb66eda46436