Resize navigation title for accessibility + IDs for UI automation

[bbirman]

Example of default and big below. The default is a little bolder than it was before but it actually matches the nav bar titles that we're already had on "Add Connection" and "Choose Connection".

Tested on iPhone + iPad in portrait and landscape

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 28 lines in your changes missing coverage. Please review.

Project coverage is 62.00%. Comparing base (106df6f) to head (76d0e89).
Report is 10 commits behind head on dev.

Files with missing lines	Patch %	Lines
...forceSDKCore/Classes/Login/SFLoginViewController.m	0.00%	22 Missing ⚠️
...ore/Classes/Login/LoginHost/NewLoginHostView.swift	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##              dev    #3803      +/-   ##
==========================================
- Coverage   62.75%   62.00%   -0.75%     
==========================================
  Files         224      225       +1     
  Lines       21361    21624     +263     
==========================================
+ Hits        13405    13408       +3     
- Misses       7956     8216     +260     

Components	Coverage Δ
Analytics	84.09% <ø> (ø)
Common	68.87% <ø> (+0.08%)	⬆️
Core	50.60% <2.63%> (-1.01%)	⬇️
SmartStore	73.70% <ø> (ø)
MobileSync	87.58% <ø> (ø)

Files with missing lines	Coverage Δ
...ore/Classes/Login/LoginHost/NewLoginHostView.swift	0.00% <0.00%> (ø)
...forceSDKCore/Classes/Login/SFLoginViewController.m	8.96% <0.00%> (-4.20%)	⬇️

... and 3 files with indirect coverage changes