Fix VendorTagDescriptorCache::getTagType

- The return value should be -1, not 0,
  for invalid vendor ids, according to
  system/media/camera/include/system/camera_vendor_tags.h

Bug: 316413287
Test: m
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:8c90ab1c747afd2f3071dd915d41f862d75ac0b6)
Merged-In: Ie1b435029f0dafdf33d6fd46baf2ad5f472b5b0b
Change-Id: Ie1b435029f0dafdf33d6fd46baf2ad5f472b5b0b