[Thread] add Android.bp format to make-pretty.sh

There are sometimes gerrit warnings on Android.bp file format:
```
Analyzer Description: Formats Android.bp files.
Owner: soong-team@google.com

This file is not formatted.

Run prebuilts/build-tools/linux-x86/bin/bpfmt -w {filename} to format the file, or apply the suggested fix.
```

This commit adds the suggested format script to make-pretty.sh to avoid
the warning.

Change-Id: I8a691b1e6af873e8c43e34ed3168203d469eee1c

thread/scripts/make-pretty.sh

@@ -3,5 +3,7 @@
 SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
 
 GOOGLE_JAVA_FORMAT=$SCRIPT_DIR/../../../../../prebuilts/tools/common/google-java-format/google-java-format
+ANDROID_BP_FORMAT=$SCRIPT_DIR/../../../../../prebuilts/build-tools/linux-x86/bin/bpfmt
 
 $GOOGLE_JAVA_FORMAT --aosp -i $(find $SCRIPT_DIR/../ -name "*.java")
+$ANDROID_BP_FORMAT -w $(find $SCRIPT_DIR/../ -name "*.bp")

thread/tests/cts/Android.bp

@@ -45,7 +45,7 @@ android_test {
     libs: [
         "android.test.base",
         "android.test.runner",
-        "framework-connectivity-module-api-stubs-including-flagged"
+        "framework-connectivity-module-api-stubs-including-flagged",
     ],
     // Test coverage system runs on different devices. Need to
     // compile for all architectures.

thread/tests/integration/Android.bp

@@ -43,7 +43,7 @@ android_test {
     manifest: "AndroidManifest.xml",
     defaults: [
         "framework-connectivity-test-defaults",
-        "ThreadNetworkIntegrationTestsDefaults"
+        "ThreadNetworkIntegrationTestsDefaults",
     ],
     test_suites: [
         "general-tests",