Cast binder data type to uint64_t in high bits test

1. Cast fb->binder to uint64_t before shifting by 32 bits. It avoids
undefined result when binder is 32-bit.

2. Swap EXPECT_EQ arguments. The first one is expected value and the
second is actual value.

Bug: 64118463
Test: ./binderLibTest on x86 emulator
Change-Id: I4f736bd5b55db5af8598db0d5cd5fbd9ef323448