Add api mapping dump feature to AIDL files

The aidl compiler can process files and dump mappings between JNI
signatures of generated methods and their corresponding position in
.aidl source files.

Test: make framework-aidl-mappings

(cherry picked from commit 390cb8bec01c9a4188a4c9472d07f73ada91af95)
Merged-In: I256cfc50967a1781f6a26064263d5f623612d40e
Change-Id: I01fc4a6e350bd3668f27667860de0763b093c587
12 files changed