Move API levels from `uint32_t` to `int`.

(cherrypick of a6c71a09670ca636cca5cfea9d74b03a951e2b5e.)

Bug: N/A
Test: builds
Change-Id: I9c414e30e3c4fe2a4e16a2fe4ce18eae85fe4844
diff --git a/libc/bionic/libc_init_dynamic.cpp b/libc/bionic/libc_init_dynamic.cpp
index 5f76354..6b2d86f 100644
--- a/libc/bionic/libc_init_dynamic.cpp
+++ b/libc/bionic/libc_init_dynamic.cpp
@@ -138,8 +138,8 @@
                  args.envp));
 }
 
-extern "C" uint32_t android_get_application_target_sdk_version();
+extern "C" int android_get_application_target_sdk_version();
 
-uint32_t bionic_get_application_target_sdk_version() {
+int bionic_get_application_target_sdk_version() {
   return android_get_application_target_sdk_version();
 }