ui: add missing files and various cleanups

Issue: #78218
Change-Id: Ib22e6f4b28ab1f40be6f79c24c8870c45868f828
diff --git a/ring-android/app/src/main/res/drawable/textmsg_background.xml b/ring-android/app/src/main/res/drawable/textmsg_background.xml
new file mode 100644
index 0000000..151c9d7
--- /dev/null
+++ b/ring-android/app/src/main/res/drawable/textmsg_background.xml
@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <stroke
+        android:width="0dp"
+        android:color="@android:color/transparent" />
+
+    <solid android:color="#ffffff" />
+
+    <padding
+        android:left="1dp"
+        android:right="1dp"
+        android:top="1dp" />
+
+    <corners android:radius="5dp" />
+
+</shape>
\ No newline at end of file