Add a way to instrument sdk sandbox processes

The following restrictions applies to the instrumentation of the sdk
sandbox processes:

* Instrumentation must be signed with the same certificate as the client
  app the instrumented sdk sandbox belongs to.
* If there is a running instance of to-be-instrumented sdk sandbox
  process, then it will be killed before the instrumentation starts.
* While instrumentation is running the client app won't be allowed to
  connect to the instrumented sdk sandbox process.
* The --no-restart instrumentation of the sdk sandbox processes is not
  supported.

Bug: 209061624
Test: atest SdkSandboxInprocessTests
Change-Id: Ia4b145c091bf8da600a77ea82fc9e3cd97757275