Revert "JNI: Remove `JniMethodFast{Start,End}()`."

This reverts commit 64d6e187f19ed670429652020561887e6b220216.

Reason for revert: Breaks no-image JIT run tests (flaky).

Bug: 172332525
Change-Id: I7813d89283eff0f6266318d3fb02d1257471798d
32 files changed