Log when context manager is unavailable.

defaultServiceManager loops here, but service manager is always expected
to be available. If it's not, log.

Bug: N/A
Test: N/A
Change-Id: Ie83c7f7136390301651efd6371bae64455b29961
diff --git a/libs/binder/ProcessState.cpp b/libs/binder/ProcessState.cpp
index c0f5e31..631e8c5 100644
--- a/libs/binder/ProcessState.cpp
+++ b/libs/binder/ProcessState.cpp
@@ -112,6 +112,10 @@
 {
     sp<IBinder> context = getStrongProxyForHandle(0);
 
+    if (context == nullptr) {
+       ALOGW("Not able to get context object on %s.", mDriverName.c_str());
+    }
+
     // The root object is special since we get it directly from the driver, it is never
     // written by Parcell::writeStrongBinder.
     internal::Stability::tryMarkCompilationUnit(context.get());