Add scripts for reusable f-droid build

bin/fdroid/build.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+
+source $HOME/.bashrc
+
+env
+
+source "bin/init/env.sh"
+
+bin/init/libs/ffmpeg.sh
+bin/init/libs/boringssl.sh
+bin/libs/v2ray.sh

bin/fdroid/prebuild.sh

@@ -0,0 +1,33 @@
+#!/usr/bin/env bash
+
+env
+
+## Install Go 1.15+
+wget -q -O - https://raw.githubusercontent.com/canha/golang-tools-install-script/master/goinstall.sh | bash -s -- --version 1.15.8
+
+## Install rust
+source $HOME/.cargo/env
+pushd ss-rust/src/main/rust/shadowsocks-rust
+rustup target install armv7-linux-androideabi aarch64-linux-android i686-linux-android x86_64-linux-android
+popd
+
+echo "rust.rustcCommand=$HOME/.cargo/bin/rustc" >> local.properties
+echo "rust.cargoCommand=$HOME/.cargo/bin/cargo" >> local.properties
+echo "rust.pythonCommand=/usr/bin/python3" >> local.properties
+
+_NDK="$ANDROID_HOME/ndk/21.3.6528147"
+[ -f "$_NDK/source.properties" ] || _NDK="$ANDROID_NDK_HOME"
+[ -f "$_NDK/source.properties" ] || _NDK="$ANDROID_HOME/ndk-bundle"
+[ -f "$_NDK/source.properties" ] || echo "Error: NDK Not found"
+ANDROID_NDK_HOME=$_NDK
+
+echo "NDK Found: $_NDK"
+echo "sdk.dir=$ANDROID_HOME" >> local.properties
+echo "ndk.dir=$ANDROID_NDK_HOME" >> local.properties
+
+## Remove unused non-free dependencies
+pushd TMessagesProj
+
+sed -i -e /play:core/d build.gradle
+sed -i -e /firebase/d build.gradle
+sed -i -e /gms/d build.gradle