Restyle [example/nrfconnect] Added support for sending UDP broadcast messages.

[restyled-io]

A duplicate of #3110 with additional commits that automatically address
incorrect style, created by Restyled.

Since the original Pull Request was opened as a fork in a contributor's
repository, we are unable to create a Pull Request branching from it with only
the style fixes.

The following Restylers made fixes:

• clang-format

To incorporate these changes, you can either:

1. Merge this Pull Request instead of the original, or

2. Ask your contributor to locally incorporate these commits and push them to
   the original Pull Request

   Expand for example instructions

   ```console
   git remote add upstream https://github.com/project-chip/connectedhomeip.git
   git fetch upstream pull/<this PR number>/head
   git merge --ff-only FETCH_HEAD
   git push
   ```
   

NOTE: As work continues on the original Pull Request, this process will
re-run and update (force-push) this Pull Request with updated style fixes as
necessary. If the style is fixed manually at any point (i.e. this process finds
no fixes to make), this Pull Request will be closed automatically.

Sorry if this was unexpected. To disable it, see our documentation.

[github-actions]

Size increase report for "nrfconnect-example-build"

File	Section	File	VM
chip-lock.elf	text	316	316
chip-lock.elf	rodata	40	40
chip-lock.elf	[LOAD #3 [RW]]	0	16
chip-lock.elf	bss	0	16
chip-lock.elf	[LOAD #1 [RWX]]	4	4
chip-lighting.elf	text	316	316
chip-lighting.elf	rodata	36	36
chip-lighting.elf	bss	0	16
chip-lighting.elf	[LOAD #1 [RWX]]	4	4
chip-lighting.elf	[LOAD #3 [RW]]	0	-16

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-lock.elf and ./pull_artifact/chip-lock.elf:

sections,vmsize,filesize
.debug_info,0,34873
.debug_line,0,4410
.debug_abbrev,0,2788
.debug_loc,0,319
text,316,316
.debug_str,0,313
.strtab,0,230
.symtab,0,176
.debug_ranges,0,120
.debug_frame,0,60
rodata,40,40
.debug_aranges,0,32
[LOAD #3 [RW]],16,0
bss,16,0
[LOAD #1 [RWX]],4,4
[Unmapped],0,-5

Comparing ./master_artifact/chip-shell.elf and ./pull_artifact/chip-shell.elf:

sections,vmsize,filesize

Comparing ./master_artifact/chip-lighting.elf and ./pull_artifact/chip-lighting.elf:

sections,vmsize,filesize
.debug_info,0,34877
.debug_line,0,4420
.debug_abbrev,0,2788
text,316,316
.debug_loc,0,315
.debug_str,0,313
.strtab,0,230
.symtab,0,176
.debug_ranges,0,120
.debug_frame,0,60
rodata,36,36
.debug_aranges,0,32
bss,16,0
[LOAD #1 [RWX]],4,4
[Unmapped],0,-7
[LOAD #3 [RW]],-16,0