Move some properties users to __system_property_read_callback()

This is needed if they will ever handle ro. properties that have
values longer than 92 characters.

Bug: 23102347
Bug: 34954705
Test: read and write properties with value length > 92 characters
Change-Id: I44aa135c97ec010f12162c30f743387810ae2c5d
diff --git a/fs_mgr/Android.bp b/fs_mgr/Android.bp
index 7fd67c2..2f530ef 100644
--- a/fs_mgr/Android.bp
+++ b/fs_mgr/Android.bp
@@ -55,12 +55,22 @@
         "liblogwrap",
         "libfstab",
     ],
+    cppflags: [
+        "-DALLOW_SKIP_SECURE_CHECK=0",
+        "-DALLOW_ADBD_DISABLE_VERITY=0",
+    ],
     product_variables: {
         debuggable: {
-            cppflags: ["-DALLOW_ADBD_DISABLE_VERITY=1"],
+            cppflags: [
+                "-UALLOW_ADBD_DISABLE_VERITY",
+                "-DALLOW_ADBD_DISABLE_VERITY=1",
+            ],
         },
         eng: {
-            cppflags: ["-DALLOW_SKIP_SECURE_CHECK=1"],
+            cppflags: [
+                "-UALLOW_SKIP_SECURE_CHECK",
+                "-DALLOW_SKIP_SECURE_CHECK=1",
+            ],
         },
     },
 }