Add SecurityTypes column to exported CSV

[gioalex07]

Include wiFiSecurityTypesDisplay in the export output as a new SecurityTypes column. This exposes the structured security type information (e.g. [SAE OWE]) already available in the model but missing from the exported data.

Summary

• Add SecurityTypes column to the exported CSV output.
• The structured security type information (e.g. [SAE OWE]) was already available in the model via wiFiSecurityTypesDisplay but was not included in the export.

What does this implement/fix?

• Export.kt: added SecurityTypes header column and wiFiSecurityTypesDisplay(context) field to each exported row
• ExportTest.kt: updated expected header and all data rows to include the new column

Does this close any issues?

• N/A (data completeness improvement)

How was this tested?

• Platform: WSL2 / AlmaLinux 9
• Build variant: debug
• Toolchain: JDK 21 (Zulu), Gradle 9.3.1, Android SDK 36

./gradlew ktlintCheck                                              → BUILD SUCCESSFUL
./gradlew testDebugUnitTest                                        → BUILD SUCCESSFUL (3432 tests)
./gradlew testDebugUnitTest --tests "com.vrem.wifianalyzer.export.ExportTest" → BUILD SUCCESSFUL

Checklist (required before marking ready)

• I added or updated unit tests (see app/src/test/)
• I followed the project's coding style (ktlint) and formatting
• I ran lint and addressed or documented any warnings
• CI checks pass (unit tests, coverage, lint)
• No sensitive data, keys, or secrets are included

Additional context

The export already included raw capabilities (e.g. [WPA2-PSK-CCMP][ESS]) as the Security column.
The new SecurityTypes column adds the resolved structured representation available from Android 13+
(e.g. [SAE OWE]), making the export more useful for analysis on modern devices.
On devices running Android 12 or earlier the column will contain [] as securityTypes is not populated.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 97.83%. Comparing base (bd25b4d) to head (55dd36c).

Additional details and impacted files

@@            Coverage Diff            @@
##               main     #601   +/-   ##
=========================================
  Coverage     97.83%   97.83%           
  Complexity      975      975           
=========================================
  Files           121      121           
  Lines          2581     2582    +1     
  Branches        211      211           
=========================================
+ Hits           2525     2526    +1     
  Misses           19       19           
  Partials         37       37           

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[VREMSoftwareDevelopment]

• Raw capabilities already include the complete security information.
• The proposed column duplicates existing information and does not provide additional value.