Remove this use of "isRecording"; it is deprecated.

[venkatsaijanumpally]

Describe the bug A clear and concise description of what the bug is.

If applicable:

Technical information

• Device: [e.g. Nexus 7 (2013)]
• OS: [e.g. LineageOS 15.1]
• OpenTracks version: [e.g. v3.2.4]
• OpenTracks commit id (only for nightly builds): [e.g. 4b333bb]

[venkatsaijanumpally]

Issue resolved Proposed solution: Replaced 'isRecording()' with 'recordingStatus.isRecording()'