core/jni/libandroid_runtime: Use ThinLTO

Partial revert of cd1e70b

There is no longer a build break here, this was only needed on R.

Change-Id: Ic0541ed792ab1b658810ef32c9b5bf278ec62540

core/jni/Android.bp

@@ -443,8 +443,7 @@ cc_library_shared {
         },
     },
 
-    // Workaround Clang LTO crash.
     lto: {
-        never: true,
+        thin: true,
     },
 }