Do not scale images in testRespectOrientation

Comparing to hardcoded numbers may fail for devices with non-standard
display density unless we account for scaling.

CL change IDs of similar fixes for:
- AVIF tests: Iec10a2d0ee772b7f4dcf426c39deb6d9bd4d761e
- HEIF tests: I614ba0735aee56e23d5be501b1d2b57ca8f4fb3a

Bug: 401799761
Flag: EXEMPT test only
Change-Id: Iedad5ce987aee8ab665af5366abcf183b3b17741