Rename android_webview_apk and android_webview_test_apk

To webview_instrumentation_apk and webview_instrumentation_test_apk

BUG=701938

Review-Url: https://codereview.chromium.org/2802093008
Cr-Commit-Position: refs/heads/master@{#466368}

docs/android_cast_build_instructions.md

@@ -234,8 +234,8 @@ the WebView shell is essentially a standalone unbundled app).
 As drawback, the shell runs in non-production rendering mode only.
 
 ```shell
-ninja -C out/Release android_webview_apk
-build/android/adb_install_apk.py out/Release/apks/AndroidWebView.apk
+ninja -C out/Release webview_instrumentation_apk
+build/android/adb_install_apk.py out/Release/apks/WebViewInstrumentation.apk
 ```
 
 If, instead, you want to build the complete Android WebView framework component and test the effect of your chromium changes in other Android app using the WebView, you should follow the [Android AOSP + chromium WebView instructions](https://www.chromium.org/developers/how-tos/build-instructions-android-webview)

docs/android_test_instructions.md

@@ -121,7 +121,7 @@ Java test files vary a bit more widely than their C++ counterparts:
     typically belong in either `<top-level directory>_javatests` or `<top-level
     directory>_test_java`. Regardless, they'll wind up getting packaged into one
     of a few test APKs:
-    -   `android_webview_test_apk` for anything in `//android_webview`
+    -   `webview_instrumentation_test_apk` for anything in `//android_webview`
     -   `content_shell_test_apk` for anything in `//content` or below
     -   `chrome_public_test_apk` for most things in `//chrome`
     -   `chrome_sync_shell_test_apk` in a few exceptional cases
@@ -270,9 +270,9 @@ out/Release/bin/run_chrome_public_test_apk [-vv]
 AndroidWebView tests:
 
 ```shell
-ninja -C out/Release android_webview_apk
-ninja -C out/Release android_webview_test_apk
-out/Release/bin/run_android_webview_test_apk [-vv]
+ninja -C out/Release webview_instrumentation_apk
+ninja -C out/Release webview_instrumentation_test_apk
+out/Release/bin/run_webview_instrumentation_test_apk [-vv]
 ```
 
 In order to run a subset of tests, use -f to filter based on test class/method