[bit] Use aapt2 instead of aapt, and don't also adb install apps on the system partition

Test: bit services
Change-Id: I7d44ffbb2745b1a6265bbc77f24f885e5f1d3981
diff --git a/tools/bit/print.h b/tools/bit/print.h
index b6c3e9a..db6cf5f 100644
--- a/tools/bit/print.h
+++ b/tools/bit/print.h
@@ -33,6 +33,7 @@
 void print_command(const Command& command);
 void print_error(const char* format, ...);
 void print_warning(const char* format, ...);
+void print_info(const char* format, ...);
 void print_one_line(const char* format, ...);
 void check_error(int err);