Fix incorrect data type in netd bpf program

uid_owner_map was changed to UidOwnerValue type but in two places
it was still treated as the old uint8_t type incorrectly.

Test: atest com.android.cts.net.HostsideRestrictBackgroundNetworkTests#testDataSaverMode_enabled
Bug: 130554570
Bug: 114231106

Merged-In: I244fd564d0dd03b3f05015acdbc90ea14ff7b3a1
Change-Id: I244fd564d0dd03b3f05015acdbc90ea14ff7b3a1
(cherry picked from commit e6b09f88)