Fix memory leaks in libsurfaceflinger_unittest

Every class that inherits from RefBase must be held by an sp<>.
Creating a RefBAse object without an sp<> causes a memory leak.

Test: adb shell /data/nativetest64/libsurfaceflinger_unittest/libsurfaceflinger_unittest
Bug: 181807839
Change-Id: I37ec274b01c5212a5a3cecc2e1eb5b4c9d6122f4
2 files changed