Stop using genrule to copy headers

There is no need to use a genrule to copy headers, just move them into
an appropriate directory in the source tree and export them directly.

Bug: 31948427
Test: mmma -j frameworks/native/libs/ui
Change-Id: I9c5f385e29c78d47479c77a546cfc737e4dd40f8
diff --git a/graphics/mapper/2.0/Android.bp b/graphics/mapper/2.0/Android.bp
index 3718503..19b1388 100644
--- a/graphics/mapper/2.0/Android.bp
+++ b/graphics/mapper/2.0/Android.bp
@@ -1,15 +1,4 @@
-genrule {
-    name: "android.hardware.graphics.mapper@2.0_genc++_headers",
-    cmd: "cp $in $genDir/android/hardware/graphics/mapper/2.0",
-    srcs: ["IMapper.h", "types.h"],
-    out: [
-        "android/hardware/graphics/mapper/2.0/IMapper.h",
-        "android/hardware/graphics/mapper/2.0/types.h",
-    ],
-}
-
 cc_library_static {
     name: "android.hardware.graphics.mapper@2.0",
-    generated_headers: ["android.hardware.graphics.mapper@2.0_genc++_headers"],
-    export_generated_headers: ["android.hardware.graphics.mapper@2.0_genc++_headers"],
+    export_include_dirs: ["include"],
 }