Make android_device pass --android_sdk_path to unified launcher.

Creates filegroup containing sdk path in Bazel embedded Android SDK repository.

--
PiperOrigin-RevId: 147426838
MOS_MIGRATED_REVID=147426838

src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_sdk_repository_template.txt

diff --git a/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_sdk_repository_template.txt b/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_sdk_repository_template.txt
index 9791c9d..cab75e8 100644
--- a/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_sdk_repository_template.txt
+++ b/src/main/java/com/google/devtools/build/lib/bazel/rules/android/android_sdk_repository_template.txt
@@ -48,6 +48,11 @@
     srcs = glob(["tools/lib64/**"]),
 )
 
+filegroup(
+    name = "sdk_path",
+    srcs = ["."],
+)
+
 create_android_device_rules(
     system_image_dirs = [
 %system_image_dirs%    ],

tools/android/emulator/BUILD.tools

diff --git a/tools/android/emulator/BUILD.tools b/tools/android/emulator/BUILD.tools
index f671a0b..f4a883c 100644
--- a/tools/android/emulator/BUILD.tools
+++ b/tools/android/emulator/BUILD.tools
@@ -34,6 +34,11 @@
     ],
 )
 
+alias(
+    name = "sdk_path",
+    actual = "@androidsdk//:sdk_path",
+)
+
 # Unified launcher is not included with Bazel or the Android SDK. Instead, it
 # comes from an external repository that must be set up in order for
 # android_device to work.
@@ -45,4 +50,4 @@
 filegroup(
     name = "shbase",
     srcs = ["googletest.sh"],
-)
\ No newline at end of file
+)