[automerge] Rename Encoder test names. 2p: 9df600ed6f 2p: bed8a762ce

Original change: https://googleplex-android-review.googlesource.com/c/platform/external/libtextclassifier/+/17392093

Bug: 226182044
Change-Id: If47d45787189c638e361442cb6519b29f26d5cec