Change AIDL module name

Naming rule for aidl module is changed to make using unstable AIDL module more explicit
So, to use unstable version AIDL module, use "-unstable" suffix version
And also, module name without any suffix means latest frozen version.

But wrt modules for C++ and NDK, module name with latest frozen version
is not available for now.

In b/139280289, more background is explained

Test: m
Bug: 139280289
Change-Id: Ib38e2cb114cc373ef50652f421ddaff9b4fbe5b9
Merged-In: Ib38e2cb114cc373ef50652f421ddaff9b4fbe5b9