Remove empty line in the pom file (#11382)

tools/android_support/generate_pom_file.py

@@ -11,8 +11,7 @@ import json
 THIS_DIR = os.path.abspath(os.path.dirname(__file__))
 
 # The template for the POM file.
-POM_FILE_CONTENT = '''
-<?xml version="1.0" encoding="UTF-8"?>
+POM_FILE_CONTENT = '''<?xml version="1.0" encoding="UTF-8"?>
 <project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
   <modelVersion>4.0.0</modelVersion>