Update SDL3 from 3.2.4 to 3.2.20

libs/SDL3/android-project/app/build.gradle

@@ -5,7 +5,7 @@ plugins {
 def buildWithCMake = project.hasProperty('BUILD_WITH_CMAKE');
 
 android {
-    namespace "org.libsdl.app"
+    namespace = "org.libsdl.app"
     compileSdkVersion 35
     defaultConfig {
         minSdkVersion 21
@@ -14,12 +14,12 @@ android {
         versionName "1.0"
         externalNativeBuild {
             ndkBuild {
-                arguments "APP_PLATFORM=android-19"
+                arguments "APP_PLATFORM=android-21"
                 // abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
                 abiFilters 'arm64-v8a'
             }
             cmake {
-                arguments "-DANDROID_PLATFORM=android-19", "-DANDROID_STL=c++_static"
+                arguments "-DANDROID_PLATFORM=android-21", "-DANDROID_STL=c++_static", "-DAPP_SUPPORT_FLEXIBLE_PAGE_SIZES=true"
                 // abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
                 abiFilters 'arm64-v8a'
             }
@@ -53,7 +53,7 @@ android {
 
     }
     lint {
-        abortOnError false
+        abortOnError = false
     }
 }