User proper type btif_dm::num_eir_uuids int=>size_t am: 33e1d946 am: 09e97df4

Original change: https://android-review.googlesource.com/c/platform/packages/modules/Bluetooth/+/2307988



Change-Id: If6e6e3e5ca0f282f38241659101f898974322e87
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>