Separated libpupil to standalone repository

Migrated to Kotlin 1.4

app/src/main/java/xyz/quaver/pupil/util/misc.kt

@@ -51,4 +51,12 @@ fun byteToString(byte: Long, precision : Int = 1) : String {
 
     return "%.${precision}f ${suffix[suffixIndex]}".format(size)
 
-}
+}
+
+/*
+ * Convert android generated ID to requestCode
+ * to prevent java.lang.IllegalArgumentException: Can only use lower 16 bits for requestCode
+ *
+ * https://stackoverflow.com/questions/38072322/generate-16-bit-unique-ids-in-android-for-startactivityforresult
+ */
+fun Int.normalizeID() = this.and(0xFFFF)