Move libandroid_runtime headers into frameworks/base/core/jni

Move libandroid_runtime's headers into its source directory, and export
them to modules that link against libandroid_runtime.  Also fixes
one unused-paramter warning that was hidden by the use of -isystem to
include frameworks/base/include.

Bug: 33630870
Test: m -j native
Change-Id: Id6c2561d6c7d82a7ca2d183f11b1d3d3dcb42843

core/jni/Android.mk

@@ -185,6 +185,7 @@ LOCAL_SRC_FILES:= \
     hwbinder/EphemeralStorage.cpp \
 
 LOCAL_C_INCLUDES += \
+    $(LOCAL_PATH)/include \
     $(JNI_H_INCLUDE) \
     $(LOCAL_PATH)/android/graphics \
     $(LOCAL_PATH)/../../libs/hwui \
@@ -279,8 +280,10 @@ LOCAL_SHARED_LIBRARIES += \
 # <bionic_tls.h> in com_google_android_gles_jni_GLImpl.cpp
 LOCAL_C_INCLUDES += bionic/libc/private
 
+LOCAL_EXPORT_C_INCLUDE_DIRS := $(LOCAL_PATH)/include
+
 # AndroidRuntime.h depends on nativehelper/jni.h
-LOCAL_EXPORT_C_INCLUDE_DIRS := libnativehelper/include
+LOCAL_EXPORT_C_INCLUDE_DIRS += libnativehelper/include
 
 LOCAL_MODULE:= libandroid_runtime
 

core/jni/include/android_runtime/AndroidRuntime.h

@@ -98,7 +98,7 @@ public:
      * Called when the Java application exits to perform additional cleanup actions
      * before the process is terminated.
      */
-    virtual void onExit(int code) { }
+    virtual void onExit(int /*code*/) { }
 
     /** create a new thread that is visible from Java */
     static android_thread_id_t createJavaThread(const char* name, void (*start)(void *),