Remove SDK dep from module_lib_api

This had the consequence of making two large metalava invocations
run in sequence rather than parallell.

For now, add back the dependency on framework-all instead. Building
framework-all should be a lot faster than the sdk stubs.

Also move the module stubs dep from framework_defaults to
framework-minus-apex. framework-all does not need this dep.

Bug: 151092414
Test: m
Test: NINJA_ARGS="-t path out/soong/.intermediates/frameworks/base/module-lib-api-stubs-docs/android_common/module-lib-api-stubs-docs-stubs.srcjar \
                          out/soong/.intermediates/frameworks/base/system-api-stubs-docs/android_common/system-api-stubs-docs-stubs.srcjar" m
Change-Id: Ifdf8823d374254e594330b43ae3a39a76c7b90c5