tools/android: Add support for creating Android virtual devices

Introduce ``tools/android/install_base.sh`` [1] script to install
Android command line tools including necessary platforms and
system-images for Linux and create Android Virtual Devices (AVD) for
Pixel 6 with Android v12 & v14 as well as an Android virtual *desktop*
device (v13) for ChromeOS tests.

[1] Forked from https://github.com/ARM-software/lisa/blob/main/install_base.sh

Signed-off-by: Metin Kaya <metin.kaya@arm.com>

tools/android/skins/pixel_6/layout

@@ -0,0 +1,36 @@
+parts {
+  device {
+    display {
+      width 1080
+      height 2400
+      x 0
+      y 0
+    }
+  }
+  portrait {
+    background {
+      image back.webp
+    }
+    foreground {
+      mask mask.webp
+      cutout hole
+    }
+  }
+}
+layouts {
+  portrait {
+    width 1209
+    height 2553
+    event EV_SW:0:1
+    part1 {
+      name portrait
+      x 0
+      y 0
+    }
+    part2 {
+      name device
+      x 60
+      y 69
+    }
+  }
+}

tools/android/skins/pixel_tablet/layout

@@ -0,0 +1,35 @@
+parts {
+  device {
+    display {
+      width 2560
+      height 1600
+      x 0
+      y 0
+    }
+  }
+  portrait {
+    background {
+      image back.webp
+    }
+    foreground {
+      mask mask.webp
+    }
+  }
+}
+layouts {
+  landscape {
+    width 2798
+    height 1837
+    event EV_SW:0:1
+    part1 {
+      name portrait
+      x 0
+      y 0
+    }
+    part2 {
+      name device
+      x 119
+      y 117
+    }
+  }
+}