Enable c++17 in recovery_defaults.

And add the first few users.

Test: Run recovery_unit_test and recovery_component_test on marlin.
Change-Id: Ifdf093d011478b6a1dd0405b0ba48c145b509cc8
diff --git a/Android.bp b/Android.bp
index c5fcd65..afab76c 100644
--- a/Android.bp
+++ b/Android.bp
@@ -24,6 +24,8 @@
         "-Wall",
         "-Werror",
     ],
+
+    cpp_std: "c++17",
 }
 
 cc_library {