remove libandroid.so from targets that don't need it

pdk builds don't have libandroid.so available.  Remove it from
projects that aren't actually using it.

Change-Id: I100dc84aaf8160c1062a122ef6d5aec0534d73fa
diff --git a/libs/gui/tests/Android.mk b/libs/gui/tests/Android.mk
index 55ac133..741534b 100644
--- a/libs/gui/tests/Android.mk
+++ b/libs/gui/tests/Android.mk
@@ -14,7 +14,6 @@
 LOCAL_SHARED_LIBRARIES := \
 	libEGL \
 	libGLESv2 \
-	libandroid \
 	libbinder \
 	libcutils \
 	libgui \
diff --git a/services/surfaceflinger/tests/Android.mk b/services/surfaceflinger/tests/Android.mk
index b655648..e210860 100644
--- a/services/surfaceflinger/tests/Android.mk
+++ b/services/surfaceflinger/tests/Android.mk
@@ -12,7 +12,6 @@
 LOCAL_SHARED_LIBRARIES := \
 	libEGL \
 	libGLESv2 \
-	libandroid \
 	libbinder \
 	libcutils \
 	libgui \