Retry SDP when we receive an SDP_BUSY response

Sometimes the stack can return an SDP_BUSY response, meaning we sent a
valid request to the stack but it couldn't be handled at this time. The
native stack doesn't enqueue or handle this event.

To fix this, we can simply retry SDP when we get an SDP_BUSY (2)
response from the native stack.

Tag: #stability
Bug: 293911750
Test: atest BluetoothInstrumentationTests
Change-Id: I9e8afd94f4e26705fdb062c49034f6851f11e098