Differentiate device sensor icons from external device icons

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It can be confusing for a user to understand which sensor you've selected, especially if 2 sensors reads the same kind of data (e.g. accelerometer XYZ). If icons are the same, and you record it's impossible to see which one is which


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Either using different icon colors or a different shape to discriminate internal and external sensors

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**Additional context**
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Start by locating the Android sensor-selection UI and the code or assets that assign icons to internal and external sensors. Compare the two screenshots and trace how sensors with the same data type are represented. Done means the source of each sensor is visually distinguishable and the distinction remains clear while recording.

Written by the indexing model from the issue text.