Useful neverallow errors

Neverallow errors include the file name and line number of the
violated rule. However, if multiple neverallow rules are included
within a single macro, then the line number is for the entire macro,
not the individual neverallow rule that is violated. To fix this,
only include one neverallow rule per macro.

This changes nothing on device, nor does it change the results of
compilation, it only makes the printed errors more useful.

Bug: 69139821
Test: build aosp_taimen-userdebug (neverallow rules are build time
    tests)

Change-Id: Id0fc5906431db20e71265c7e9d55fbee4bdf53db