[nrfconnect] Change BLE and logging configuration

[Damian-Nordic]

Problem

Update BLE and logging configuration for nRF Connect platform/examples

Summary of Changes

• use meaningful BLE Device names
• 1 BLE connection at a time should be enough
• don't print debug BLE messages to the console
• btw, fix Service.cpp to use the right logger (app instead of serv)

[github-actions]

Size increase report for "nrfconnect-example-build"

File	Section	File	VM
chip-shell.elf	[LOAD #1 [RWX]]	6	6
chip-shell.elf	[LOAD #2 [RW]]	-2	-2
chip-shell.elf	[LOAD #3 [RW]]	0	-4
chip-shell.elf	datas	-118	-118
chip-shell.elf	noinit	0	-372
chip-shell.elf	bss	0	-2620
chip-shell.elf	rodata	-14868	-14868
chip-shell.elf	text	-106886	-106886
chip-lock.elf	[LOAD #1 [RWX]]	12	12
chip-lock.elf	[LOAD #3 [RW]]	0	-4
chip-lock.elf	[LOAD #2 [RW]]	-6	-6
chip-lock.elf	datas	-90	-90
chip-lock.elf	noinit	0	-372
chip-lock.elf	bss	0	-2620
chip-lock.elf	rodata	-7132	-7132
chip-lock.elf	text	-79724	-79724
chip-lighting.elf	[LOAD #1 [RWX]]	12	12
chip-lighting.elf	[LOAD #3 [RW]]	0	-4
chip-lighting.elf	[LOAD #2 [RW]]	-6	-6
chip-lighting.elf	datas	-90	-90
chip-lighting.elf	noinit	0	-372
chip-lighting.elf	bss	0	-2620
chip-lighting.elf	rodata	-7132	-7132
chip-lighting.elf	text	-79724	-79724

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

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

sections,vmsize,filesize
[LOAD #1 [RWX]],6,6
[LOAD #2 [RW]],-2,-2
[LOAD #3 [RW]],-4,0
datas,-118,-118
noinit,-372,0
bss,-2620,0
.debug_aranges,0,-3936
.debug_frame,0,-12764
.debug_ranges,0,-13664
rodata,-14868,-14868
.strtab,0,-17378
.symtab,0,-28000
.debug_str,0,-32086
.debug_abbrev,0,-37334
text,-106886,-106886
.debug_line,0,-128474
.debug_loc,0,-150529
.debug_info,0,-1730303

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

sections,vmsize,filesize
[LOAD #1 [RWX]],12,12
[Unmapped],0,-1
[LOAD #3 [RW]],-4,0
[LOAD #2 [RW]],-6,-6
datas,-90,-90
noinit,-372,0
bss,-2620,0
.debug_aranges,0,-3504
rodata,-7132,-7132
.debug_frame,0,-11084
.debug_ranges,0,-12472
.strtab,0,-13832
.symtab,0,-21264
.debug_str,0,-29219
.debug_abbrev,0,-35769
text,-79724,-79724
.debug_line,0,-112566
.debug_loc,0,-126565
.debug_info,0,-1708536

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

sections,vmsize,filesize
[LOAD #1 [RWX]],12,12
[LOAD #3 [RW]],-4,0
[LOAD #2 [RW]],-6,-6
[Unmapped],0,-9
datas,-90,-90
noinit,-372,0
bss,-2620,0
.debug_aranges,0,-3504
rodata,-7132,-7132
.debug_frame,0,-11084
.debug_ranges,0,-12472
.strtab,0,-13832
.symtab,0,-21264
.debug_str,0,-29219
.debug_abbrev,0,-35769
text,-79724,-79724
.debug_line,0,-112566
.debug_loc,0,-126565
.debug_info,0,-1708536

[rwalker-apple]

@hawk248 @jelderton @saurabhst @BroderickCarlin ?