Add setting to increase logging verbosity (#354)

Adds a toggle to increase the verbosity of the app logs for
release/production builds

Most users won't need to use this, but it can be helpful when [gathering
app
logs](https://github.com/damontecres/Wholphin/wiki/Gathering-app-logs)
to report an issue.

app/src/main/java/com/github/damontecres/wholphin/util/DebugLogTree.kt

@@ -0,0 +1,42 @@
+package com.github.damontecres.wholphin.util
+
+import android.util.Log
+import com.github.damontecres.wholphin.BuildConfig
+import timber.log.Timber
+
+class DebugLogTree private constructor() : Timber.Tree() {
+    // Only add logging for below INFO, production logger in WholphinApplication logs >=INFO
+    override fun isLoggable(
+        tag: String?,
+        priority: Int,
+    ): Boolean = priority < Log.INFO && !BuildConfig.DEBUG
+
+    override fun log(
+        priority: Int,
+        tag: String?,
+        message: String,
+        t: Throwable?,
+    ) {
+        Log.println(priority, tag ?: "Wholphin", message)
+    }
+
+    var enabled: Boolean
+        get() = Timber.forest().contains(this)
+        set(value) {
+            synchronized(this) {
+                if (value) {
+                    if (!Timber.forest().contains(this)) {
+                        Timber.plant(this)
+                    }
+                } else {
+                    if (Timber.forest().contains(this)) {
+                        Timber.uproot(this)
+                    }
+                }
+            }
+        }
+
+    companion object {
+        val INSTANCE = DebugLogTree()
+    }
+}