49754db5a3
Added TOOL_TYPE_ERASER. Refactored the InputReader to share more code between the various input mappers that handle button states and to simplify the accumulator implementations by having each one only handle a single type of input. Removed the concept of direct/indirect tool types from the API. If we add it back, it should be done in a manner that is orthogonal to the tool type itself, perhaps as a flags field on the pointer. The device source may well provide sufficient information anyhow. Change-Id: I811c22d95e8304269b6ee4f6d11a6b04f3cfc1b2