Remove logging when metadata tag can't be found.

This logging is expensive when it happens at 30fps (measured at around
0.5 mW per such message @30fps). Furthermore, no such logging happens in
the SDK when a tag can't be found, so this is simply aligning the
NDK's behavior with the SDK's.

Bug: 290694535
Test: built and confirmed power reduction.

Change-Id: I2b5397aa79fb176d90678a30550af08872b29a20
diff --git a/camera/ndk/impl/ACameraMetadata.cpp b/camera/ndk/impl/ACameraMetadata.cpp
index 4995dc4..1fd4a86 100644
--- a/camera/ndk/impl/ACameraMetadata.cpp
+++ b/camera/ndk/impl/ACameraMetadata.cpp
@@ -400,7 +400,6 @@
 
     camera_metadata_ro_entry rawEntry = static_cast<const CameraMetadata*>(mData.get())->find(tag);
     if (rawEntry.count == 0) {
-        ALOGE("%s: cannot find metadata tag %d", __FUNCTION__, tag);
         return ACAMERA_ERROR_METADATA_NOT_FOUND;
     }
     entry->tag = tag;