feat: call directly instead of launching dialpad

[naveensingh]

Type of change(s)

• Bug fix
• Feature / enhancement
• Infrastructure / tooling (CI, build, deps, tests)
• Documentation

What changed and why

• Updated the dialNumber() method to use ACTION_CALL instead of ACTION_DIAL when CALL_PHONE permission is available.
• Added CALL_PHONE permission to the manifest. Unlike other apps (see this), declaring this permission is not required because the SMS role grants the whole Phone permission set by default as per this code, but I added it anyway to avoid issues due to any OEM-specific changes and to not rely on a "side-effect".

Tests performed

• Calling

Closes the following issue(s)

• Closes Call from messages displays number instead of dialling immediately #562

Checklist

• I read the contribution guidelines.
• I manually tested my changes on device/emulator (if applicable).
• I updated the "Unreleased" section in CHANGELOG.md (if applicable).
• I have self-reviewed my pull request (no typos, formatting errors, etc.).
• All checks are passing.