fix: Remove empty session replay tags

[philipphofmann]

📜 Description

Don't add maskedViewClasses and unmaskedViewClasses when being empty.

💡 Motivation and Context

Slightly improves the situation for #4666.

💚 How did you test it?

Unit tests.

📝 Checklist

You have to check all boxes before merging:

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

🔮 Next steps

[philprime]

LGTM

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.661%. Comparing base (0aea1a1) to head (b129072).
Report is 2 commits behind head on main.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #4667       +/-   ##
=============================================
- Coverage   90.664%   90.661%   -0.004%     
=============================================
  Files          621       621               
  Lines        71157     71165        +8     
  Branches     25931     25944       +13     
=============================================
+ Hits         64514     64519        +5     
- Misses        6545      6547        +2     
- Partials        98        99        +1     

Files with missing lines	Coverage Δ
.../SessionReplay/RRWeb/SentryRRWebOptionsEvent.swift	100.000% <100.000%> (ø)
...tions/SessionReplay/SentrySessionReplayTests.swift	99.069% <100.000%> (ø)

... and 7 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1240.38 ms	1262.10 ms	21.72 ms
Size	22.31 KiB	760.65 KiB	738.33 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
eaf3840	1264.94 ms	1274.04 ms	9.10 ms
794f87f	1225.78 ms	1243.46 ms	17.68 ms
ff09c7e	1244.86 ms	1246.68 ms	1.82 ms
bd2afa6	1241.37 ms	1246.20 ms	4.83 ms
8d16504	1235.50 ms	1258.76 ms	23.26 ms
3723833	1224.71 ms	1247.92 ms	23.21 ms
3cba0e8	1236.29 ms	1271.21 ms	34.92 ms
3277f18	1229.29 ms	1248.92 ms	19.63 ms
ac8fd53	1201.42 ms	1214.55 ms	13.13 ms
e324230	1244.43 ms	1252.98 ms	8.55 ms

App size

Revision	Plain	With Sentry	Diff
eaf3840	22.84 KiB	401.67 KiB	378.83 KiB
794f87f	20.76 KiB	401.37 KiB	380.61 KiB
ff09c7e	20.76 KiB	427.77 KiB	407.00 KiB
bd2afa6	20.76 KiB	420.55 KiB	399.79 KiB
8d16504	20.76 KiB	434.92 KiB	414.16 KiB
3723833	21.58 KiB	424.34 KiB	402.76 KiB
3cba0e8	22.84 KiB	403.19 KiB	380.34 KiB
3277f18	22.84 KiB	402.88 KiB	380.03 KiB
ac8fd53	21.58 KiB	419.81 KiB	398.22 KiB
e324230	22.85 KiB	408.88 KiB	386.03 KiB