[FEATURE] Putting the updateable_apex.mk inherit into the central common repo with guards

https://github.com/sonyxperiadev/device-sony-tama/commit/598c51d2d87a0e32cb396f6b9003904c7818e6ec

It got committed to every platform repo for supported devices.

Check if it is better to add it into the https://github.com/sonyxperiadev/device-sony-common repo.
Maybe guards are needed.