Add logging for soft error cases when raising thread priority

Summary:
The two cases being logged are:

1. We looped several times and never succeeded at raising the thread priority. If we only ever see this and rarely (2), then perhaps it is safe to only make one attempt instead of looping
2. We looped more than once and eventually found a priority we could successfully set

With this information maybe we can tell which devices / OS versions / etc, have issues with manually setting thread priorities

Reviewed By: OlehMalanchuk

Differential Revision: D75980989

fbshipit-source-id: f449cc94ecdacd31cb2644e825639d15857adb42

Author: Case Beaman

litho-core/src/main/java/com/facebook/litho/ThreadUtils.kt

@@ -108,6 +108,17 @@ object ThreadUtils {
         threadPriority += Process.THREAD_PRIORITY_LESS_FAVORABLE
       }
     }
+    if (threadPriority == originalThreadPriority) {
+      // We were unable to raise the priority of the thread at all.
+      ComponentsConfiguration.softErrorHandler?.handleSoftError(
+          "Unable to raise priority to $targetThreadPriority from $originalThreadPriority",
+          "ThreadUtils")
+    } else if (threadPriority > targetThreadPriority) {
+      // We were able to raise the priority but not at the desired level.
+      ComponentsConfiguration.softErrorHandler?.handleSoftError(
+          "ThreadUtils",
+          "Encountered an error raising priority to $targetThreadPriority from $originalThreadPriority but succeeded at $threadPriority")
+    }
     return Pair(originalThreadPriority, threadPriority)
   }