Enable clang-tidy in libaaudio.

Enabling clang-tidy could help find programming errors at compile time.

Bug: 186572209
Test: make, atest AAudioTests
Change-Id: If48282d10701df87b80a99e2a3d2199437189d70
diff --git a/media/libaaudio/src/utility/FixedBlockAdapter.h b/media/libaaudio/src/utility/FixedBlockAdapter.h
index 4dc7e68..290e473 100644
--- a/media/libaaudio/src/utility/FixedBlockAdapter.h
+++ b/media/libaaudio/src/utility/FixedBlockAdapter.h
@@ -35,7 +35,7 @@
 class FixedBlockAdapter
 {
 public:
-    FixedBlockAdapter(FixedBlockProcessor &fixedBlockProcessor)
+    explicit FixedBlockAdapter(FixedBlockProcessor &fixedBlockProcessor)
     : mFixedBlockProcessor(fixedBlockProcessor) {}
 
     virtual ~FixedBlockAdapter() = default;