Rename keystore.{h|cpp} to KeyStore.{h|cpp}

We currently have two different keystore.h files.  This renames one of
them, and the corresponding implementation, to KeyStore.h, which
tracks the class name.

Test: runtest --path cts/tests/tests/keystore/src/android/keystore/cts
Change-Id: I910e3d60d165b65d055e7da92acd04d3ee73a6d3
5 files changed