Add Android support (#749)

src/steps/os/android.rs

@@ -0,0 +1,31 @@
+use crate::execution_context::ExecutionContext;
+use crate::terminal::print_separator;
+use crate::utils::require;
+use anyhow::Result;
+
+pub fn upgrade_packages(ctx: &ExecutionContext) -> Result<()> {
+    let pkg = require("pkg")?;
+
+    print_separator("Termux Packages");
+
+    let mut command = ctx.run_type().execute(&pkg);
+    command.arg("upgrade");
+    if ctx.config().yes() {
+        command.arg("-y");
+    }
+    command.check_run()?;
+
+    if ctx.config().cleanup() {
+        ctx.run_type().execute(&pkg).arg("clean").check_run()?;
+
+        let apt = require("apt")?;
+        let mut command = ctx.run_type().execute(&apt);
+        command.arg("autoremove");
+        if ctx.config().yes() {
+            command.arg("-y");
+        }
+        command.check_run()?;
+    }
+
+    Ok(())
+}