Camera: Make stream use case to be 64 bit

This increases the available bits for OEMs' custom range.

Test: Camera CTS
Bug: 223387965
Change-Id: I4bc1ccc5430a8c54dd753a410155723be890080f
diff --git a/proto/src/camera.proto b/proto/src/camera.proto
index 4082118..38d74e4 100644
--- a/proto/src/camera.proto
+++ b/proto/src/camera.proto
@@ -66,5 +66,5 @@
     // The dynamic range profile of the stream
     optional int64 dynamic_range_profile = 14;
     // The stream use case
-    optional int32 stream_use_case = 15;
+    optional int64 stream_use_case = 15;
 }