Convert generate-self-extracting-archive.py to python 3

Test: Add a VENDOR_BLOBS_LICENSE entry to an existing product, then `m with-license`
Bug: 203436762
Change-Id: I4bbe77bda7789b6c44bea141518b1cd2e699d326

tools/Android.bp

@@ -28,27 +28,11 @@ package {
 python_binary_host {
   name: "generate-self-extracting-archive",
   srcs: ["generate-self-extracting-archive.py"],
-  version: {
-    py2: {
-      enabled: true,
-    },
-    py3: {
-      enabled: false,
-    },
-  },
 }
 
 python_binary_host {
   name: "post_process_props",
   srcs: ["post_process_props.py"],
-  version: {
-    py2: {
-      enabled: false,
-    },
-    py3: {
-      enabled: true,
-    },
-  },
 }
 
 python_test_host {
@@ -58,14 +42,6 @@ python_test_host {
     "post_process_props.py",
     "test_post_process_props.py",
   ],
-  version: {
-    py2: {
-      enabled: false,
-    },
-    py3: {
-      enabled: true,
-    },
-  },
   test_config: "post_process_props_unittest.xml",
   test_suites: ["general-tests"],
 }
@@ -73,14 +49,6 @@ python_test_host {
 python_binary_host {
   name: "extract_kernel",
   srcs: ["extract_kernel.py"],
-  version: {
-    py2: {
-      enabled: false,
-    },
-    py3: {
-      enabled: true,
-    },
-  },
 }
 
 genrule_defaults {