Add an adapter iterator class to bluez

[andy31415]

Problem

Python code needs the ability to list available bluez interfaces from code (and likely this would also be very useful within native application code).

Summary of Changes

Adds an 'AdapterIterator' class that is a ble to list available bluez interfaces.

[mspang]

std::string?

I'd posit that we're wasting our time when we try to apply the same constraints we have on tightly constrained code to the Linux port.

[andy31415]

Agree. I have a hard time figuring out when I should/should not use constrained stuff so I default to uglier code.

I would prefer to leave as is for this PR because less changes and CI takes a long time. Will take it into account if I touch this later.

[github-actions]

Size increase report for "nrfconnect-example-build" from ca099a2

File	Section	File	VM
chip-lock.elf	text	16	16
chip-lock.elf	rodata	8	8
chip-shell.elf	rodata	8	8
chip-shell.elf	text	-4	-4
chip-shell.elf	log_const_sections	-12	-12
chip-lighting.elf	text	16	16
chip-lighting.elf	rodata	8	8

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_line,0,3796
.symtab,0,16
text,16,16
.strtab,0,13
rodata,8,8
.shstrtab,0,-1
.debug_aranges,0,-8
.debug_frame,0,-24
.debug_ranges,0,-72
.debug_str,0,-137
.debug_loc,0,-215
.debug_abbrev,0,-3080
.debug_info,0,-16196

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

sections,vmsize,filesize
.debug_line,0,799
.symtab,0,16
.strtab,0,13
rodata,8,8
.shstrtab,0,3
text,-4,-4
.debug_aranges,0,-8
log_const_sections,-12,-12
.debug_frame,0,-24
.debug_ranges,0,-72
.debug_str,0,-88
.debug_loc,0,-272
.debug_abbrev,0,-2259
.debug_info,0,-15788

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

sections,vmsize,filesize
.debug_line,0,3794
.symtab,0,16
text,16,16
.strtab,0,13
rodata,8,8
.shstrtab,0,-1
.debug_aranges,0,-8
.debug_frame,0,-24
.debug_ranges,0,-72
.debug_str,0,-137
.debug_loc,0,-215
.debug_abbrev,0,-3079
.debug_info,0,-16195

[github-actions]

Size increase report for "esp32-example-build" from ca099a2

File	Section	File	VM
chip-pigweed-app.elf	.flash.rodata	4	4
chip-pigweed-app.elf	.flash.text	-28	-28
chip-all-clusters-app.elf	.flash.text	-24	-24

Full report output

BLOAT REPORT

Files found only in the build output:
    report.csv

Comparing ./master_artifact/chip-pigweed-app.elf and ./pull_artifact/chip-pigweed-app.elf:

sections,vmsize,filesize
.strtab,0,16
.flash.rodata,4,4
.xt.prop._ZSt9__find_ifIPKSt4byteN9__gnu_cxx5__ops10_Iter_predIPFbS0_EEEET_S9_S9_T0_St26random_access_iterator_tag,0,1
[Unmapped],0,-4
.debug_aranges,0,-8
.debug_ranges,0,-8
.debug_frame,0,-24
.flash.text,-28,-28
.debug_loc,0,-97
.debug_line,0,-2087
.debug_abbrev,0,-2161
.debug_str,0,-5590
.debug_info,0,-31242

Comparing ./master_artifact/chip-all-clusters-app.elf and ./pull_artifact/chip-all-clusters-app.elf:

sections,vmsize,filesize
.debug_line,0,10759
.strtab,0,16
.xt.prop._ZTVN4chip11DeviceLayer37DeviceNetworkProvisioningDelegateImplE,0,-2
.debug_aranges,0,-8
.debug_ranges,0,-8
.debug_frame,0,-24
.flash.text,-24,-24
.debug_loc,0,-37
.debug_str,0,-121
.debug_abbrev,0,-3902
.debug_info,0,-33061