FuriHal: fix start duration furi_hal_subghz_async_tx

[Skorpionm]

What's new

• FuriHal: add check min duration arr for the first level

Verification

• Enable data output from GD0 to the external comb. attach a logic analyzer. Play the attached file, the levels must correspond exactly to 1700 -900 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 1700 -900 1700 -900 900 -1700 1700 -900 900 -1700 900 -1 700 900 -1700 900 - 1700 1700 -900 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 1700 -900 1700 -900 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 1700 -900 900 -1700 1700 - 900 1700 -900 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 1700 -900 1700 -900 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 900 -1700 900 -1700 900 -1700 900 -1700 1700 -900 900 -1700 1700 -900 1700 -900 1700 -900 1700 -900 900 -1700 1700 -900

example.sub.txt

• Files for testing. Limitations: internal support for CC1101, duration from 2us, external from 4us. all durations below these values ​​will be increased to them
  subghz_test.zip

• When transmitting, there is now no need to worry about the sequence of high/low durations. Or you can simply feed the required durations with levels, the driver itself will glue everything together correctly and transmit it. Example RAW file with Manchester encoding
  

Checklist (For Reviewer)

• PR has description of feature/bug or link to Confluence/Jira task
• Description contains actions to verify feature/bugfix
• I've built this code, uploaded it to the device and verified feature/bugfix

[github-actions]

Compiled f7 firmware for commit e209c02d:

• 📦 Update package
• 📥 DFU file
• ☁️ Web/App updater

[skotopes]

subghz_test_files.zip
@Skorpionm FURI_HAL_SUBGHZ_ASYNC_MIRROR_GPIO feature is broken

[skotopes]

Double negatives handling is broken