[PTZ] Add missing tests for pan and tilt in applyConstraints()

This CL adds similar tests to zoom for pan and tilt constraints when
calling applyConstraints with invalid values.

Bug: 934063
Change-Id: I0d7926ba5c887604fc77c0854e3d3fccea784f5b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2435640Reviewed-by: Rijubrata Bhaumik <rijubrata.bhaumik@intel.com>
Reviewed-by: Reilly Grant <reillyg@chromium.org>
Commit-Queue: François Beaufort <beaufort.francois@gmail.com>
Cr-Commit-Position: refs/heads/master@{#811615}

third_party/blink/web_tests/external/wpt/mediacapture-image/MediaStreamTrack-applyConstraints-reject.html

@@ -72,6 +72,10 @@ const constraintGenerators = [
   capabilities => ({ saturation: capabilities.saturation.min - 1 }),
   capabilities => ({ sharpness: capabilities.sharpness.max + 1 }),
   capabilities => ({ sharpness: capabilities.sharpness.min - 1 }),
+  capabilities => ({ pan: capabilities.pan.max + 1 }),
+  capabilities => ({ pan: capabilities.pan.min - 1 }),
+  capabilities => ({ tilt: capabilities.tilt.max + 1 }),
+  capabilities => ({ tilt: capabilities.tilt.min - 1 }),
   capabilities => ({ zoom: capabilities.zoom.max + 1 }),
   capabilities => ({ zoom: capabilities.zoom.min - 1 }),
   capabilities => ({ torch: true }),