MH2 | Implement debug method of HalProxy

Bug: 9569382
Test: Observed debug output from
$ adb shell lshal debug android.hardware.sensors@2.0::ISensors/default
Change-Id: I9f2627a05d37bd8407a22e263b7557834a9677b8
diff --git a/sensors/2.0/multihal/tests/Android.bp b/sensors/2.0/multihal/tests/Android.bp
index e3a4af1..50a55f9 100644
--- a/sensors/2.0/multihal/tests/Android.bp
+++ b/sensors/2.0/multihal/tests/Android.bp
@@ -82,6 +82,7 @@
     shared_libs: [
         "android.hardware.sensors@1.0",
         "android.hardware.sensors@2.0",
+        "libbase",
         "libcutils",
         "libfmq",
         "libhidlbase",