Remove unnecessary casts.

Also turn up strict-aliasing warnings to the maximum (and default!) level.

Change-Id: I97f1d2c180ce515719f8c92d54b8a6ae6a6942c4
diff --git a/build/Android.common.mk b/build/Android.common.mk
index f7e97a1..ac477a2 100644
--- a/build/Android.common.mk
+++ b/build/Android.common.mk
@@ -40,7 +40,7 @@
 	-Werror \
 	-Wextra \
 	-Wno-unused-parameter \
-	-Wstrict-aliasing=2 \
+	-Wstrict-aliasing=3 \
 	-fno-align-jumps \
 	-fstrict-aliasing