Revert "Revert "Use the interpreter as a heartbeat for the JIT.""

Bug: 27398183
Bug: 23128949
Bug: 26846185

This reverts commit a96917a6983a5abbe973255a3846fda549fb1657.

Change-Id: I5c4f0d87d3293a6a7ab56a33396670704b66a347
7 files changed