Add deviceId to Context and allow for creating Contexts with different deviceId.

Applications may create contexts associated with the default host device or with any virtual device. The only way to create a non-default device context for now is via an explcit createDeviceContext call.

Bug: 239152561
Test: atest FrameworksCoreTests:ContextTest
Change-Id: If18dc7661fb232b0bc40121c723673ba880be9d5