IDirtyRowService can be inlined into InputHandler

[Tyriar]

I think it's only used there and on related events:

xterm.js/src/common/CoreTerminal.ts

Lines 136 to 143 in 318abe6

	this.register(this._bufferService.onScroll(event => {
	this._onScroll.fire({ position: this._bufferService.buffer.ydisp, source: ScrollSource.TERMINAL });
	this._dirtyRowService.markRangeDirty(this._bufferService.buffer.scrollTop, this._bufferService.buffer.scrollBottom);
	}));
	this.register(this._inputHandler.onScroll(event => {
	this._onScroll.fire({ position: this._bufferService.buffer.ydisp, source: ScrollSource.TERMINAL });
	this._dirtyRowService.markRangeDirty(this._bufferService.buffer.scrollTop, this._bufferService.buffer.scrollBottom);
	}));

Encapsulating this over having a service will simplify the codebase.