Have you tried "7notes with mazec" on the google play store? This app allows you to handwrite first and convert to text later if you want. There is a free version to try it out: "7notes Free"
One thing to note: 7notes is not totally freehand writing. You write in a box on the bottom and it shrinks your handwriting and puts it up top. So it's good for writing only, but not for mixed writing and drawings.
Another option, which is not exactly what you asked for, is to export your Snote as an image and send it to Evernote, which will recognize your handwriting. Your handwritten notes are now searchable, but they are not actually converted to editable text.