Update android_building.md

Author: yunhanw-google

docs/platforms/android/android_building.md

@@ -55,12 +55,11 @@ downloaded.
     3. Select NDK (Side by Side) -> 23.2.8568313
     4. Apply
 3. Install Command Line Tools:
-    1. Tools -> SDK Manager -> SDK Tools Tab -> Android SDK Command Line Tools
-       (latest)
+    1. Tools -> SDK Manager -> SDK Tools Tab -> Android SDK Command Line Tools 10.0
     2. Apply
-4. Install SDK 26:
-    1. Tools -> SDK Manager -> SDK Platforms Tab -> Android 8.0 (Oreo) SDK Level
-       26
+4. Install SDK 30:
+    1. Tools -> SDK Manager -> SDK Platforms Tab -> Android 11.0 (R) SDK Level
+       30
     2. Apply
 5. Install Emulator:
     1. Tools -> Device Manager -> Create device -> Pixel 5 -> Android S API 31
@@ -98,21 +97,21 @@ architecture:
 
 ### Gradle & JDK Version
 
-All Android projects utilize Gradle version 7.3.3 and JDK version 17.0.
+All Android projects utilize Gradle version 7.3.3 and JDK version 11.0.
 
-For developer using openjdk-17-jdk in MacOS, the JAVA_HOME environment variable
+For developer using java 11 in MacOS, the JAVA
 can be configured as follows via `sdkman`:
 
 ```
-sdk install java 17.0.4.1-tem
+sdk install java 11.0.26-tem
 ```
 
-For developer using openjdk-17-jdk in Linux, the JAVA_HOME environment variable
+For developer using openjdk-11-jdk in Linux, the JAVA_HOME environment variable
 can be configured as follows:
 
 ```
-sudo apt-get install openjdk-17-jdk
-export JAVA_HOME=/usr/lib/jvm/java-17-openjdk-amd64
+sudo apt-get install openjdk-11-jdk
+export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-amd64
 ```
 
 <a name="kotlin"></a>