Add FuseBridgeLoop to libappfuse.

The CL adds FuseBridgeLoop class to libappfuse, which is used in the
system service to proxy fuse commands to applications.

Bug: 29970149
Test: libappfuse_test
Change-Id: I0708f608b3868721ab16ba4028fd2c17a6735af7
diff --git a/libappfuse/Android.bp b/libappfuse/Android.bp
index 8d24af1..8b46154 100644
--- a/libappfuse/Android.bp
+++ b/libappfuse/Android.bp
@@ -15,12 +15,12 @@
     name: "libappfuse",
     defaults: ["libappfuse_defaults"],
     export_include_dirs: ["include"],
-    srcs: ["AppFuse.cc"]
+    srcs: ["FuseBuffer.cc", "FuseBridgeLoop.cc"]
 }
 
 cc_test {
     name: "libappfuse_test",
     defaults: ["libappfuse_defaults"],
     shared_libs: ["libappfuse"],
-    srcs: ["tests/AppFuseTest.cc"]
+    srcs: ["tests/FuseBridgeLoopTest.cc", "tests/FuseBufferTest.cc"]
 }