Stop #define'ing __ANDROID_API__.

The correct way to make this work for the host fuzzers is to use the
"libbinder_ndk_host_user" defaults.

Also normalize the non-bionic definitions of __INTRODUCED_IN() to match
the majority.

Bug: http://b/178449269
Test: treehugger
Change-Id: I2df8bf705600544553f4889d39f7740136dcff48
3 files changed