Stop using deprecated __system_property_get()

If android API >= 26 (i.e. in android in-tree builds),
__system_property_read_callback() can be used instead.

Bug: 154844297
Change-Id: I9ec3d49c5e4c35281bf8405b4ae1453cd13f3179
diff --git a/Android.bp b/Android.bp
index 1887b50..b41a10f 100644
--- a/Android.bp
+++ b/Android.bp
@@ -6840,6 +6840,7 @@
 filegroup {
     name: "perfetto_src_base_base",
     srcs: [
+        "src/base/android_utils.cc",
         "src/base/crash_keys.cc",
         "src/base/ctrl_c_handler.cc",
         "src/base/event_fd.cc",