pw_kvs: Rename sector_descriptor.h to sectors.h

Preparing for SectorDescriptor list refactor.

Change-Id: I1265bf3986c997e14e92af075853cbb5a8b0f367
diff --git a/pw_kvs/BUILD b/pw_kvs/BUILD
index 76bef4f..f469cce 100644
--- a/pw_kvs/BUILD
+++ b/pw_kvs/BUILD
@@ -36,7 +36,7 @@
         "public/pw_kvs/internal/entry_cache.h",
         "public/pw_kvs/internal/hash.h",
         "public/pw_kvs/internal/key_descriptor.h",
-        "public/pw_kvs/internal/sector_descriptor.h",
+        "public/pw_kvs/internal/sectors.h",
         "public/pw_kvs/internal/span_traits.h",
         "pw_kvs_private/macros.h",
     ],
diff --git a/pw_kvs/BUILD.gn b/pw_kvs/BUILD.gn
index 9c95799..5c89533 100644
--- a/pw_kvs/BUILD.gn
+++ b/pw_kvs/BUILD.gn
@@ -41,7 +41,7 @@
     "public/pw_kvs/internal/entry_cache.h",
     "public/pw_kvs/internal/hash.h",
     "public/pw_kvs/internal/key_descriptor.h",
-    "public/pw_kvs/internal/sector_descriptor.h",
+    "public/pw_kvs/internal/sectors.h",
     "public/pw_kvs/internal/span_traits.h",
     "pw_kvs_private/macros.h",
   ]
diff --git a/pw_kvs/public/pw_kvs/internal/sector_descriptor.h b/pw_kvs/public/pw_kvs/internal/sectors.h
similarity index 100%
rename from pw_kvs/public/pw_kvs/internal/sector_descriptor.h
rename to pw_kvs/public/pw_kvs/internal/sectors.h
diff --git a/pw_kvs/public/pw_kvs/key_value_store.h b/pw_kvs/public/pw_kvs/key_value_store.h
index be90f9d..16e5fb6 100644
--- a/pw_kvs/public/pw_kvs/key_value_store.h
+++ b/pw_kvs/public/pw_kvs/key_value_store.h
@@ -26,7 +26,7 @@
 #include "pw_kvs/internal/entry.h"
 #include "pw_kvs/internal/entry_cache.h"
 #include "pw_kvs/internal/key_descriptor.h"
-#include "pw_kvs/internal/sector_descriptor.h"
+#include "pw_kvs/internal/sectors.h"
 #include "pw_kvs/internal/span_traits.h"
 #include "pw_span/span.h"
 #include "pw_status/status.h"