Function to enable / disable encryption requirements

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Function to enable and disable encryption requirements as a whole.

The original Arduino BLE library uses uint8_t for characteristic properties, and the new uses the same bits for the properties but changes the type to uint16_t to allow for BLE permissions too. If uint8_t is passed to the new uint16_t then the 8 MSBs may become undefined leading to unpredictable behaviour.

• Will the compiler catch this to prevent the issue?
• Does there need to be another location to define permissions? I.e. revert to uint8_t for properties & add new constructor,
• Use uint16_t as is & add function to prevent encryption / auth checks.

I think the third is the most stable but if the compiler will warn developers putting uint8_t into uint16_t then this doesn’t need to happen.