Revert "liblog: disable header_abi_checker"

All planned changes to liblog have been made, so it's time to
re-enable this.

This reverts commit 896fb9e57af24adc9fa1b96874f7d0685dc39755.

Bug: 150608248
Test: build
(cherry picked from commit cfcf684c83d705f4ed46d4eca91da5dcc032978f)
Merged-In: I93553da6207976c83091f21936b0ecdd31e82848
Change-Id: I93553da6207976c83091f21936b0ecdd31e82848
diff --git a/liblog/Android.bp b/liblog/Android.bp
index 7f183c2..f1e5118 100644
--- a/liblog/Android.bp
+++ b/liblog/Android.bp
@@ -101,11 +101,6 @@
         versions: ["29", "30"],
     },
 
-    // TODO(tomcherry): Renable this before release branch is cut
-    header_abi_checker: {
-        enabled: false,
-    },
-
     cflags: [
         "-Wall",
         "-Werror",