Add android entry

pages/04.other/20.android/01.adb/default.en.md

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+---
+title: ADB
+visible: true
+---
+
+[toc]
+
+## Full Storage backup
+The easiest, and probably intended way to copy files using adb can be seen in the following command.  
+`$ adb pull -a -p /sdcard/ ./<target folder>`  
+The exmple here makes a copy of all content in "sdcard", the user's data directory.  
+
+### Compressed backup
+Using this command, a backup can be pulled as well. This time however, it is passed to zstd for compression.  
+Tar on the phone doesn't do much except go through all files and send them to the terminal's STDOUT. All the compression happens on the host.  
+`$ adb exec-out "tar -cf - /sdcard/* 2>/dev/null" | zstd -19 -T16 -v -o sdcard.zstd`  

pages/04.other/20.android/default.en.md

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+---
+title: Android
+visible: true
+---
+
+[toc]