Imported from GitHub PR https://github.com/google/nearby/pull/2404
Copybara import of the project:
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a6fbb3c396321c0b9012b787323f5f2ff652fd8f by Nick Bourdakos <bourdakos1@gmail.com>:
Add license header to all source files
Merging this change closes#2404
PiperOrigin-RevId: 623540004
New features:
* Smart Audio Source Switching.
* Fast Pair for BLE-only devices.
* Two byte salt size for improved security.
Other changes:
* Added optional encryption modules based on mbedtls.
* Fixed build issues.
* More verbose and readable logs.