Suppress implicit-fallthrough warnings in libaudioclient.

Add FALLTHROUGH_INTENDED for clang compiler.

Bug: 112564944
Test: build with global -Wimplicit-fallthrough.
Change-Id: Icafaff606364fe7bffaad1e9c2e763c444ea999c

media/libaudioclient/Android.bp

@@ -53,7 +53,10 @@ cc_library_shared {
     export_shared_lib_headers: ["libbinder"],
 
     local_include_dirs: ["include/media", "aidl"],
-    header_libs: ["libaudioclient_headers"],
+    header_libs: [
+        "libaudioclient_headers",
+        "libbase_headers",
+    ],
     export_header_lib_headers: ["libaudioclient_headers"],
 
     // for memory heap analysis

media/libaudioclient/AudioRecord.cpp

@@ -19,6 +19,7 @@
 #define LOG_TAG "AudioRecord"
 
 #include <inttypes.h>
+#include <android-base/macros.h>
 #include <sys/resource.h>
 
 #include <binder/IPCThreadState.h>
@@ -1446,7 +1447,7 @@ bool AudioRecord::AudioRecordThread::threadLoop()
     case NS_WHENEVER:
         // Event driven: call wake() when callback notifications conditions change.
         ns = INT64_MAX;
-        // fall through
+        FALLTHROUGH_INTENDED;
     default:
         LOG_ALWAYS_FATAL_IF(ns < 0, "processAudioBuffer() returned %" PRId64, ns);
         pauseInternal(ns);

media/libaudioclient/AudioTrack.cpp

@@ -22,6 +22,7 @@
 #include <math.h>
 #include <sys/resource.h>
 
+#include <android-base/macros.h>
 #include <audio_utils/clock.h>
 #include <audio_utils/primitives.h>
 #include <binder/IPCThreadState.h>
@@ -2964,7 +2965,7 @@ bool AudioTrack::hasStarted()
         if (mProxy->getStreamEndDone()) {
             return true;
         }
-        // fall through
+        FALLTHROUGH_INTENDED;
     case STATE_ACTIVE:
     case STATE_STOPPING:
         break;
@@ -3083,7 +3084,7 @@ bool AudioTrack::AudioTrackThread::threadLoop()
     case NS_WHENEVER:
         // Event driven: call wake() when callback notifications conditions change.
         ns = INT64_MAX;
-        // fall through
+        FALLTHROUGH_INTENDED;
     default:
         LOG_ALWAYS_FATAL_IF(ns < 0, "processAudioBuffer() returned %" PRId64, ns);
         pauseInternal(ns);

media/libaudioclient/AudioTrackShared.cpp

@@ -17,6 +17,7 @@
 #define LOG_TAG "AudioTrackShared"
 //#define LOG_NDEBUG 0
 
+#include <android-base/macros.h>
 #include <private/media/AudioTrackShared.h>
 #include <utils/Log.h>
 
@@ -247,7 +248,7 @@ status_t ClientProxy::obtainBuffer(Buffer* buffer, const struct timespec *reques
                 ts = requested;
                 break;
             }
-            // fall through
+            FALLTHROUGH_INTENDED;
         case TIMEOUT_CONTINUE:
             // FIXME we do not retry if requested < 10ms? needs documentation on this state machine
             if (!measure || requested->tv_sec < total.tv_sec ||
@@ -505,7 +506,7 @@ status_t AudioTrackClientProxy::waitStreamEndDone(const struct timespec *request
                 ts = requested;
                 break;
             }
-            // fall through
+            FALLTHROUGH_INTENDED;
         case TIMEOUT_CONTINUE:
             // FIXME we do not retry if requested < 10ms? needs documentation on this state machine
             if (requested->tv_sec < total.tv_sec ||

media/libaudioclient/include/media/AudioPolicyHelper.h

@@ -16,6 +16,7 @@
 #ifndef AUDIO_POLICY_HELPER_H_
 #define AUDIO_POLICY_HELPER_H_
 
+#include <android-base/macros.h>
 #include <system/audio.h>
 
 static inline
@@ -81,7 +82,7 @@ void stream_type_to_audio_attributes(audio_stream_type_t streamType,
         break;
     case AUDIO_STREAM_ENFORCED_AUDIBLE:
         attr->flags  |= AUDIO_FLAG_AUDIBILITY_ENFORCED;
-        // intended fall through, attributes in common with STREAM_SYSTEM
+        FALLTHROUGH_INTENDED; // attributes in common with STREAM_SYSTEM
     case AUDIO_STREAM_SYSTEM:
         attr->content_type = AUDIO_CONTENT_TYPE_SONIFICATION;
         attr->usage = AUDIO_USAGE_ASSISTANCE_SONIFICATION;