Remove unwrap() calls in UciManager.

Bug: 281879716
Test: atest libuwb_core_test libuwb_uci_packet_tests libuwb_uci_jni_rust_tests
(cherry picked from https://android-review.googlesource.com/q/commit:d13603dda23c1ac68a627e402548c83822718437)
Merged-In: Ie70e9720a41cb6f08c44bf4896838d53bd7a28be
Change-Id: Ie70e9720a41cb6f08c44bf4896838d53bd7a28be
1 file changed