Add total GPU usage report into dumpsys meminfo output

With latest kernel changes, total GPU memory usage is reported and can
be obtained via a BPF program. Create JNI interface to query it and
report inside dumpsys meminfo output.

Bug: 171261987
Test: dumpsys meminfo
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Merged-In: I949a13836d5b5bc87fc43f60871b4fbf2add6480
Change-Id: I949a13836d5b5bc87fc43f60871b4fbf2add6480

core/java/android/os/Debug.java

@@ -2575,6 +2575,13 @@ public final class Debug
      */
     public static native long getIonMappedSizeKb();
 
+    /**
+     * Return memory size in kilobytes used by GPU.
+     *
+     * @hide
+     */
+    public static native long getGpuTotalUsageKb();
+
     /**
      * Return whether virtually-mapped kernel stacks are enabled (CONFIG_VMAP_STACK).
      * Note: caller needs config_gz read sepolicy permission