Clean up description of IRemotelyProvisionedComponent uniqueId

The identifier is to be used in telemetry to identify problematic
implementations. Thus, it needs to be globally consistent, at least
within a given device type.

Test: None -- doc only changes
Bug: 231495834
Change-Id: Ia55db336fa099d8e1196f6bfe2bafb6fa5ead329
Merged-In: Ia55db336fa099d8e1196f6bfe2bafb6fa5ead329