logd: rename FlushToResult to FilterResult

This was a typo; the enum corresponds to the result of the 'Filter'
function, not the 'FlushTo' function.

Test: build
Change-Id: Ib46f0646570b6dbaac17ae9fc95c990128cdbe72
diff --git a/logd/LogReader.cpp b/logd/LogReader.cpp
index 234ddc7..26f2ed2 100644
--- a/logd/LogReader.cpp
+++ b/logd/LogReader.cpp
@@ -172,26 +172,26 @@
         bool start_time_set = false;
         uint64_t last = sequence;
         auto log_find_start = [pid, logMask, start, &sequence, &start_time_set,
-                               &last](const LogBufferElement* element) -> FlushToResult {
+                               &last](const LogBufferElement* element) -> FilterResult {
             if (pid && pid != element->getPid()) {
-                return FlushToResult::kSkip;
+                return FilterResult::kSkip;
             }
             if ((logMask & (1 << element->getLogId())) == 0) {
-                return FlushToResult::kSkip;
+                return FilterResult::kSkip;
             }
             if (start == element->getRealTime()) {
                 sequence = element->getSequence();
                 start_time_set = true;
-                return FlushToResult::kStop;
+                return FilterResult::kStop;
             } else {
                 if (start < element->getRealTime()) {
                     sequence = last;
                     start_time_set = true;
-                    return FlushToResult::kStop;
+                    return FilterResult::kStop;
                 }
                 last = element->getSequence();
             }
-            return FlushToResult::kSkip;
+            return FilterResult::kSkip;
         };
 
         log_buffer_->FlushTo(socket_log_writer.get(), sequence, nullptr, log_find_start);