Composer Alberto Iglesias is the secret ingredient of Pedro Almodóvar’s new picture, “The Room Next Door.” Mr. Iglesias has worked for the Spanish filmmaker on numerous occasions, including signature Almodóvar films such as “All About My Mother” (1999) and “Talk To Her” (2002), as well as on films by Oliver Stone, Steven Soderbergh, and Ridley Scott. Mr. Iglesias has won a number of international awards but has yet to cull an Oscar — notwithstanding having been nominated for Best Original Score four times over.