Define toolbox.recovery

By removing `recovery_available` property from "toolbox" and defining a
dedicated recovery-specific module for "toolbox". `recovery_available`
property should be used to allow the reverse dependencies recovery
modules to depend on the module, not to install the module to the
recovery partition.

Test: m soong_generated_recovery_filesystem_test
Bug: 381888358
Change-Id: I8e1bbf56aaf5ba4a761d84e60afa420ba6f825b9