Fix/v1.6.1 fix connection v7a

[iampedii]

Title

Fix Xray TCP/HTTP imports and release v1.6.1

Summary

• Preserve Xray VLESS TCP/HTTP camouflage during Mihomo conversion.
• Map HTTP requests to network: http with the correct method, paths, and headers.
• Keep genuine bare-TCP profiles unchanged.
• Add regression coverage.
• Update versionName to 1.6.1 while preserving versionCode = 79.

Validation

• Full unit test suite passed.
• Debug APK build passed.
• Emulator Real Delay improved from 0/15 to 13/15.
• Mihomo accepted all 15 generated profiles: 14 HTTP and one bare TCP.
• git diff --check passed.

Two profiles still failed Real Delay on the emulator; full VPN connection testing was not completed.