binder: Use a smaller "large vector" size with TIPC

Reduce the SendLargeVector test size in binderRpcTest
for the TIPC socket type because the qemu emulator is too
slow and the test takes too long.

Bug: 425451705
Test: build.py --test "binder" qemu-generic-arm64-gicv3-test-debug
Flag: EXEMPT test
Change-Id: If402bed06522c362c82a122e890fd4c25ab44c39