BLE: support non-low power devices

[ghost]

Summary of changes

The Bluetooth API uses LowPowerTimer, LowPowerTicker and LowPowerTimeout objects for time-related operations. As result, compilation fails on targets that do not use these classes (e.g., Nucleo F3 targets).

This PR updates the code in connectivity/FEATURE_BLE/source/ such that, according to the target's capabilities, the correct timing primitives are used, enabling compilation on non-low power devices.

Impact of changes

Migration actions required

Documentation

None

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Pull request type

[x] Patch update (Bug fix / Target update / Docs update / Test update / Refactor)
[ ] Feature update (New feature / Functionality change / New API)
[ ] Major update (Breaking change E.g. Return code change / API behaviour change)

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Test results

[ ] No Tests required for this change (E.g docs only update)
[x] Covered by existing mbed-os tests (Greentea or Unittest)
[ ] Tests / results supplied as part of this PR

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Reviewers

@pan- @MarceloSalazar

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[ciarmcom]

@noonfom, thank you for your changes.
@pan- @MarceloSalazar @ARMmbed/mbed-os-maintainers please review.

[pan-]

The change looks good however it is not recommended to use using directives in the global scope. Can you move the using directives inside the class ? You need to slit import from using.

Pull request has been modified.

[MarceloSalazar]

LGTM - thanks!

[ciarmcom]

This pull request has automatically been marked as stale because it has had no recent activity. @ARMmbed/mbed-os-maintainers, please start CI to get the PR merged.

[0xc0170]

CI started

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