mesh: Fix missing feature bits
mesh: Fix missing feature bits

The feature bits for Proxy and Friend were missing in the composition
data and heart beat messages.

Ported from Zephyr PR #4345

X-Original-Commit: 510b2e3851538fcae55276f89668033253b59aeb

apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble,apache/mynewt-nimble