liboboe: add _STREAM_ to OBOE_STATE, general cleanup of comments

See comments from https://googleplex-android-review.git.corp.google.com/#/c/1642945/

Test: just headers, nothing to test

Change-Id: I0d8d0c721c6371115ee565add7352fa4db748ba4
Signed-off-by: Phil Burk <philburk@google.com>
diff --git a/media/liboboe/include/oboe/OboeDefinitions.h b/media/liboboe/include/oboe/OboeDefinitions.h
index ff9bd92..b3e2deb 100644
--- a/media/liboboe/include/oboe/OboeDefinitions.h
+++ b/media/liboboe/include/oboe/OboeDefinitions.h
@@ -53,7 +53,7 @@
     OBOE_DIRECTION_COUNT // This should always be last.
 };
 
-enum {
+enum oboe_datatype_t {
     OBOE_AUDIO_DATATYPE_INT16,
     OBOE_AUDIO_DATATYPE_INT32,
     OBOE_AUDIO_DATATYPE_INT824,
@@ -62,7 +62,7 @@
     OBOE_AUDIO_DATATYPE_COUNT // This should always be last.
 };
 
-enum {
+enum oboe_content_t {
     OBOE_AUDIO_CONTENT_PCM,
     OBOE_AUDIO_CONTENT_MP3,
     OBOE_AUDIO_CONTENT_AAC,
@@ -73,7 +73,7 @@
     OBOE_AUDIO_CONTENT_COUNT // This should always be last.
 };
 
-enum {
+enum oboe_wrapper_t {
     OBOE_AUDIO_WRAPPER_NONE,
     OBOE_AUDIO_WRAPPER_IEC61937, // Add new values below.
     OBOE_AUDIO_WRAPPER_COUNT // This should always be last.
@@ -133,19 +133,19 @@
 
 typedef enum
 {
-    OBOE_STATE_UNINITIALIZED = 0,
-    OBOE_STATE_OPEN,
-    OBOE_STATE_STARTING,
-    OBOE_STATE_STARTED,
-    OBOE_STATE_PAUSING,
-    OBOE_STATE_PAUSED,
-    OBOE_STATE_FLUSHING,
-    OBOE_STATE_FLUSHED,
-    OBOE_STATE_STOPPING,
-    OBOE_STATE_STOPPED,
-    OBOE_STATE_CLOSING,
-    OBOE_STATE_CLOSED,
-} oboe_state_t;
+    OBOE_STREAM_STATE_UNINITIALIZED = 0,
+    OBOE_STREAM_STATE_OPEN,
+    OBOE_STREAM_STATE_STARTING,
+    OBOE_STREAM_STATE_STARTED,
+    OBOE_STREAM_STATE_PAUSING,
+    OBOE_STREAM_STATE_PAUSED,
+    OBOE_STREAM_STATE_FLUSHING,
+    OBOE_STREAM_STATE_FLUSHED,
+    OBOE_STREAM_STATE_STOPPING,
+    OBOE_STREAM_STATE_STOPPED,
+    OBOE_STREAM_STATE_CLOSING,
+    OBOE_STREAM_STATE_CLOSED,
+} oboe_stream_state_t;
 
 // TODO review API
 typedef enum {