Revert "Never enable LTO for libunwind_llvm"

New toolchain update has fixed the underlying issue, workaround no longer needed.

This reverts commit 34ed2ea33c5cbd8799e8658080a0017fc702e538.
Bug: 78627089
Test: Test: Verify that libmemunreachable.so with LTO has hidden visibility for _Unwind_VRS_Set

Change-Id: Ifae3107d6507b86022ef31912baa43d96a0d259a
diff --git a/Android.bp b/Android.bp
index 81dad26..61709d6 100644
--- a/Android.bp
+++ b/Android.bp
@@ -68,7 +68,4 @@
             enabled: true,
         },
     },
-    lto: {
-        never: true,
-    }
 }