Remove -sha256 flag when calling bssl_inject_hash. am: c54158d3c7

Original change: https://googleplex-android-review.googlesource.com/c/platform/build/soong/+/18675166

Change-Id: I76081946caa900152215dcf43effa9099e5213a2
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>