Fix crash when creating an EncryptedFile in Android 6

[jmartinesp]

Type of change

• Feature
• Bugfix
• Technical
• Other :

Content

• Makes sure the parent directory of the secret key file used for encrypting the session data is created before we try to create the actual key file.

Motivation and context

Fixes #2846.

Tests

• Do a clean install of the app on an Android 6 emulator. If it doesn't crash it's fixed.

Tested devices

• Physical
• Emulator
• OS version(s): 6

Checklist

• Changes have been tested on an Android device or Android emulator with API 23
• UI change has been tested on both light and dark themes
• Accessibility has been taken into account. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#accessibility
• Pull request is based on the develop branch
• Pull request includes a new file under ./changelog.d. See https://github.com/element-hq/element-x-android/blob/develop/CONTRIBUTING.md#changelog
• Pull request includes screenshots or videos if containing UI changes
• Pull request includes a sign off
• You've made a self review of your PR

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
No data about Coverage
No data about Duplication

See analysis details on SonarCloud

[github-actions]

📱 Scan the QR code below to install the build (arm64 only) for this PR.

If you can't scan the QR code you can install the build via this link: https://i.diawi.com/zivfoj

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 3 lines in your changes are missing coverage. Please review.

Project coverage is 73.99%. Comparing base (87bd3ee) to head (bec01d8).
Report is 2 commits behind head on develop.

Files	Patch %	Lines
...ies/sessionstorage/impl/di/SessionStorageModule.kt	0.00%	3 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2853      +/-   ##
===========================================
- Coverage    73.99%   73.99%   -0.01%     
===========================================
  Files         1531     1531              
  Lines        36526    36529       +3     
  Branches      7065     7066       +1     
===========================================
  Hits         27028    27028              
- Misses        5796     5799       +3     
  Partials      3702     3702              

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.