Add BitUtils bit packing methods (Connectivity metrics: add transports pretty printing)

This patch is a partial cherry-pick from commit
df456e13a1127e3c8594b1d22ea4a9b3dca67a4b for the BitUtils and
NetworkCapabilities classes.

Bug: 34901696
Test: none

(cherry picked from commit df456e13a1127e3c8594b1d22ea4a9b3dca67a4b)

Merged-In: Id04f9080e7f75608deeb49306aec34941e71794c
Change-Id: I64eae49f646365b7cd1683a689315fe03bf0bdd9
2 files changed