android: clean up and update for new release

src/android/app/build.gradle

@@ -6,8 +6,8 @@ android {
         applicationId "org.rabbits.uxn"
         minSdkVersion 16
         targetSdkVersion 32
-        versionCode 5
-        versionName "1.4"
+        versionCode 6
+        versionName "1.5"
         ndk {
             abiFilters 'armeabi-v7a', 'arm64-v8a', 'x86', 'x86_64'
         }

src/android/app/src/main/assets/font.rom

@@ -1 +0,0 @@
-../../../../../../bin/font.rom

src/android/build.gradle

@@ -15,7 +15,7 @@ buildscript {
         google()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.0.4'
+        classpath 'com.android.tools.build:gradle:7.2.0-alpha07'
 
         // NOTE: Do not place your application dependencies here; they belong
         // in the individual module build.gradle files