Revert^2 "Disable -Wno-single-bit-bitfield-constant-conversion locally"

This reverts commit c667749398f76b05bb2e72115d9491118ed0d197.

Reason for revert: This change was reverted along with the soong flag switch even though it is safe to merge.

Change-Id: Ia4dbe7fc39361900e1f48636be9ffe65453c2c9d

Android.bp

diff --git a/Android.bp b/Android.bp
index 6d59c06..fd36b23 100644
--- a/Android.bp
+++ b/Android.bp
@@ -77,6 +77,7 @@
         "-Wno-null-pointer-arithmetic",
         "-Wno-register",
         "-Wno-shift-count-overflow",
+        "-Wno-single-bit-bitfield-constant-conversion",
         "-Wno-sign-compare",
         "-Wno-strict-prototypes",
         "-Wno-tautological-compare",