Rename android.compat.IPlatformCompat

To com.android.internal.compat.IPlatformCompat. This solves a java9
issue because libcore exported api has the same package android.compat.

Test: EXPERIMENTAL_JAVA_LANGUAGE_LEVEL_9=true make framework
Change-Id: I0918344f670669cecb04f1e9e54dbcb471b587d5
3 files changed