v6: apf_interpreter.{h,c} - create placeholder text am: ca8f966ba3

Original change: https://android-review.googlesource.com/c/platform/hardware/google/apf/+/3029877

Change-Id: I0951fc665e9fc558f0656b53b3caea5c5601d45e
Signed-off-by: Automerger Merge Worker <[email protected]>