Implement drawTextOnPath with Minikin

This patch contains an implementation of drawTextOnPath for both
software and hardware Canvas using Minikin for text layout. One of the
steps for switching all remaining text operations to Minikin so the old
TextLayout and Skia fallback fonts mechanisms can be deleted.

Bug: 11750374 Resolve TODO items for Minikin
Change-Id: I06bfe74a101fa1dcdfc38f530f7194d71e522a85