IDrm/ICrypto: implement getLogMessages

Bug: 162255728
Test: build
Change-Id: I68edcd04729a5721117e13a48304b842a61dfee5
diff --git a/drm/libmediadrm/Android.bp b/drm/libmediadrm/Android.bp
index b49ec75..b042c27 100644
--- a/drm/libmediadrm/Android.bp
+++ b/drm/libmediadrm/Android.bp
@@ -64,6 +64,7 @@
         "android.hardware.drm@1.0",
         "android.hardware.drm@1.1",
         "android.hardware.drm@1.2",
+        "android.hardware.drm@1.4",
     ],
 
     cflags: [