GE Debugger: Preserve VRAM textures / render-to-texture in dumps

[unknownbrackets]

Threw in a few unrelated changes as well. Chiefly, this implements better VRAM texture handling as per #9780.

Other things:

• Dodge a spurious warning when creating GE dumps on Android (CreateFullPath)
• Fix some breakage in GE debugger from Remove constraint that virtual framebuffers have to represent VRAM. #11553.
• Record memcpys in block transfer too - but behavior when stride is not aligned is a bit different (might motivate a dedicated command...)
• Prevent the disassembly and web debugger from thinking a syscall has an invalid address (they both use this same code.)

-[Unknown]

[hrydgard]

Good stuff!