Revert "Disable pre-optimization for TeleService app."

This reverts commit 427f12545642e4896032e09734b4e5e9f40c86f3.

Reason for revert: Didn't fix the root cause. In any case, when TeleService APK will be packaged in APEX, it won't be dexpreopted.

Change-Id: I1b0a1447fbae6e44435cab87cf20f6194778a6d1
diff --git a/Android.bp b/Android.bp
index 0c215b8..a7ae0cc 100644
--- a/Android.bp
+++ b/Android.bp
@@ -72,10 +72,6 @@
         ],
     },
 
-    dex_preopt: {
-        enabled: false,
-    },
-
     defaults: ["SettingsLibDefaults"],
 
     proto: {