ANDROID: Fix clang 4.0 errors

Clang 4.0 errors if a pointer is compared > 0.  Switch to != NULL
instead.

Bug: 69449598
Change-Id: Ibccb00327f21ddb48e7d5b2915da74b00ded3fd9
(cherry picked from commit eeefff50de27aca421ceb152cb0f85115a11f5f4)
2 files changed