ScanRequestProxy: Remove redundant clearCallingIdentity

Bug: 74970282
Test: Manual verification - Scans still work from setting, ACTS test &
CTS tests.
Test: ./frameworks/opt/net/wifi/tests/wifitests/runtests.sh

Change-Id: I30d38b308204784c771f03c46ca0ba722668e79f
1 file changed